[IMP][REM] mass_mailing_themes: rename images and remove unused images

In the previous version of the mail builder, the snippets had different
styles and images according to the selected template.
Now the snippets just use the default image so there's no need for
duplicates in the templates' folders.

The snippet `two_cols` no longer exists since the new version of the
mail builder, its images have been removed.

The header snippet uses the user's company logo, not the template's
default logo. If no logo image is used in the template,
there is no need for it in the folder.

The remaining images have been renamed for more consistency, except for
logo images that are .png format; these must have custom names (not
starting with `s_default_image_xxx`, as this forces .jpg).

Part-of: odoo/odoo#95940

addons/mass_mailing_themes/views/mass_mailing_themes_templates.xml

@@ -73,7 +73,7 @@
                     <div class="col-lg-12 s_media_list_item pt0 pb0" data-name="Media item">
                         <div class="row s_col_no_resize s_col_no_bgcolor align-items-center o_cc o_cc1">
                             <div class="col-lg-5 s_media_list_img_wrapper align-self-stretch px-0">
-                                <img src="/mass_mailing_themes/static/src/img/theme_newsletter/s_media_list_1.jpg" class="s_media_list_img h-100 w-100" style="padding: 10px;"/>
+                                <img src="/mass_mailing_themes/static/src/img/theme_newsletter/s_default_image_media_list_1.jpg" class="s_media_list_img h-100 w-100" style="padding: 10px;"/>
                             </div>
                             <div class="col-lg-7 s_media_list_body">
                                 <h3>Get 6-months' worth of knowledge
@@ -86,7 +86,7 @@
                     <div class="col-lg-12 s_media_list_item pt16 pb0" data-name="Media item">
                         <div class="row s_col_no_resize s_col_no_bgcolor align-items-center o_cc o_cc1">
                             <div class="col-lg-5 s_media_list_img_wrapper align-self-stretch px-0">
-                                <img src="/mass_mailing_themes/static/src/img/theme_newsletter/s_media_list_2.jpg" class="s_media_list_img h-100 w-100" style="padding: 10px;"/>
+                                <img src="/mass_mailing_themes/static/src/img/theme_newsletter/s_default_image_media_list_2.jpg" class="s_media_list_img h-100 w-100" style="padding: 10px;"/>
                             </div>
                             <div class="col-lg-7 s_media_list_body">
                                 <h3>Meet (other) awesome members
@@ -99,7 +99,7 @@
                     <div class="col-lg-12 s_media_list_item pt16 pb0" data-name="Media item">
                         <div class="row s_col_no_resize s_col_no_bgcolor align-items-center o_cc o_cc1">
                             <div class=" col-lg-5 s_media_list_img_wrapper align-self-stretch px-0">
-                                <img src="/mass_mailing_themes/static/src/img/theme_newsletter/s_media_list_3.jpg" class="s_media_list_img h-100 w-100" style="padding: 10px;"/>
+                                <img src="/mass_mailing_themes/static/src/img/theme_newsletter/s_default_image_media_list_3.jpg" class="s_media_list_img h-100 w-100" style="padding: 10px;"/>
                             </div>
                             <div class="col-lg-7 s_media_list_body">
                                 <h3>An interactive, fun
@@ -180,8 +180,8 @@
             <div class="container">
                 <div class="row">
                     <div class="col-lg-8">
-                        <a style="text-decoration:none;float:none;" href="#">
-                            <img width="189" style="height:auto;max-width:400px;" src="/mass_mailing_themes/static/src/img/theme_tech/s_default_image_logo.png"/>
+                        <a t-att-href="(company_id.website) or '#'" style="text-decoration:none;float:none;" target="_blank">
+                            <img border="0" width="189" style="height:auto;max-width:400px;" src="/mass_mailing_themes/static/src/img/theme_tech/tech_logo.png"/>
                         </a>
                     </div>
                     <div class="col-lg-4 o_mail_header_social" style="text-align:right;">
@@ -218,7 +218,7 @@
                         <p style="text-align:left;"><a class="btn btn-primary rounded-circle" href="#">VISIT OUR WEBSITE</a></p>
                     </div>
                     <div class="col-lg-5 px-0">
-                        <img class="img-fluid o_we_custom_image" src="/mass_mailing_themes/static/src/img/theme_tech/text_image-triangle.png" data-original-id="242" data-original-src="/mass_mailing_themes/static/src/img/theme_tech/s_default_image_text_image.jpg" data-mimetype="image/svg+xml" data-shape="mass_mailing/basic/triangle" data-file-name="text_image-triangle.svg" data-shape-colors=";;;;" data-original-mimetype="image/jpeg"/>
+                        <img class="img-fluid o_we_custom_image" src="/mass_mailing_themes/static/src/img/theme_tech/s_default_image_text_image.jpg" data-original-id="242" data-original-src="/mass_mailing_themes/static/src/img/theme_tech/s_default_image_text_image.jpg" data-mimetype="image/svg+xml" data-shape="mass_mailing/basic/triangle" data-file-name="text_image-triangle.svg" data-shape-colors=";;;;" data-original-mimetype="image/jpeg"/>
                     </div>
                 </div>
             </div>
@@ -232,7 +232,7 @@
                     <div class="col-lg-12 s_media_list_item pb0 pt0" data-name="Media item">
                         <div class="row s_col_no_resize s_col_no_bgcolor align-items-center o_cc o_cc1">
                             <div class="col-lg-4 s_media_list_img_wrapper align-self-stretch px-0">
-                                <img src="/mass_mailing_themes/static/src/img/theme_tech/tech_media_list_image_1.jpg" class="s_media_list_img h-100 w-100"/>
+                                <img src="/mass_mailing_themes/static/src/img/theme_tech/s_default_image_media_list_1.jpg" class="s_media_list_img h-100 w-100"/>
                             </div>
                             <div class="col-lg-8 s_media_list_body">
                                 <h3>The future of smartphone video production</h3>
@@ -255,7 +255,7 @@
                     <div class="col-lg-12 s_media_list_item pb0 pt0" data-name="Media item">
                         <div class="row s_col_no_resize s_col_no_bgcolor align-items-center o_cc o_cc1">
                             <div class="col-lg-4 s_media_list_img_wrapper align-self-stretch px-0">
-                                <img src="/mass_mailing_themes/static/src/img/theme_tech/tech_media_list_image_2.jpg" class="s_media_list_img h-100 w-100"/>
+                                <img src="/mass_mailing_themes/static/src/img/theme_tech/s_default_image_media_list_2.jpg" class="s_media_list_img h-100 w-100"/>
                             </div>
                             <div class="col-lg-8 s_media_list_body pt16 pb16">
                                 <h3>5 Ways Drones Can Better Your Live Events</h3>
@@ -276,7 +276,7 @@
                     <div class="col-lg-12 s_media_list_item pt0 pb0" data-name="Media item">
                         <div class="row s_col_no_resize s_col_no_bgcolor align-items-center o_cc o_cc1">
                             <div class="col-lg-4 s_media_list_img_wrapper align-self-stretch px-0">
-                                <img src="/mass_mailing_themes/static/src/img/theme_tech/tech_media_list_image_3.jpg" class="s_media_list_img h-100 w-100"/>
+                                <img src="/mass_mailing_themes/static/src/img/theme_tech/s_default_image_media_list_3.jpg" class="s_media_list_img h-100 w-100"/>
                             </div>
                             <div class="col-lg-8 s_media_list_body">
                                 <h3>How to Code a Website Without Experience</h3>
@@ -505,7 +505,7 @@
             <div class="container">
                 <div class="row align-items-center">
                     <div class="col-lg-8 px-0">
-                        <img src="/mass_mailing_themes/static/src/img/theme_bold/s_default_image_block_image_text.jpg" class="img w-100" style="width: 533px;"/>
+                        <img src="/mass_mailing_themes/static/src/img/theme_bold/s_default_image_image_text.jpg" class="img w-100" style="width: 533px;"/>
                     </div>
                     <div class="col-lg-4 o_cc pt0 pb0">
                         <h2 style="text-align: center;">IN THIS ISSUE</h2>
@@ -551,7 +551,7 @@
                     <div class="col-lg-6 o_cc">
                         <h3><font style="background-color: rgb(231, 148, 57);">TRAVEL</font></h3>
                         <a href="#">
-                            <img class="img-fluid o_we_custom_image" src="/mass_mailing_themes/static/src/img/theme_bold/s_product_list_image_2.jpg" alt="Man on a rock looking at mountains in the distance" style="width: 100% !important; padding: 15px 0px;"/>
+                            <img class="img-fluid o_we_custom_image" src="/mass_mailing_themes/static/src/img/theme_bold/s_default_image_product_2.jpg" alt="Man on a rock looking at mountains in the distance" style="width: 100% !important; padding: 15px 0px;"/>
                         </a>
                         <h2 style="text-align: left;">Destinations for an eco-holiday</h2>
                         <p style="text-align: left;">Bitten by the travel bug but looking to travel consciously? Eco-travel is the way forward.</p>
@@ -564,7 +564,7 @@
                     <div class="col-lg-6 o_cc">
                         <h3><font style="background-color: rgb(231, 99, 99);">LIFESTYLE</font></h3>
                         <a href="#">
-                            <img class="img-fluid o_we_custom_image" src="/mass_mailing_themes/static/src/img/theme_bold/s_product_list_image_1.jpg" alt="Woman having breakfast in bed" style="width: 100% !important; padding: 15px 0px;"/>
+                            <img class="img-fluid o_we_custom_image" src="/mass_mailing_themes/static/src/img/theme_bold/s_default_image_product_1.jpg" alt="Woman having breakfast in bed" style="width: 100% !important; padding: 15px 0px;"/>
                         </a>
                         <h2 style="text-align: left;">Top 5 energy-boosting morning routines</h2>
                         <p style="text-align: left;">Imagine waking up with more energy, more flexibility, with less stress and fewer instances of anxiously rushing out the door.</p>
@@ -594,7 +594,7 @@
                         </div>
                     </div>
                     <div class="col-lg-6 px-0">
-                        <img src="/mass_mailing_themes/static/src/img/theme_bold/s_image_text_2.jpg" class="img w-100"/>
+                        <img src="/mass_mailing_themes/static/src/img/theme_bold/s_default_image_image_text_2.jpg" class="img w-100"/>
                     </div>
                 </div>
             </div>
@@ -672,7 +672,7 @@
                     <div class="col-lg-4"></div>
                     <div class="col-lg-4 pt16 pb16" style="text-align: center;">
                         <a style="text-decoration:none;" href="http://www.example.com">
-                            <img src="/mass_mailing_themes/static/src/img/theme_bignews/s_default_image_logo.png" width="70" style="height:auto;max-width:400px;width:70px"/>
+                            <img src="/mass_mailing_themes/static/src/img/theme_bignews/bignews_logo.png" width="70" style="height:auto;max-width:400px;width:70px"/>
                         </a>
                     </div>
                     <div class="col-lg-4" style="text-align:right"></div>
@@ -685,7 +685,7 @@
             </div>
         </div>
         <div class="s_cover o_mail_snippet_general pt0" data-snippet="s_cover" data-name="Cover">
-            <img src="/mass_mailing_themes/static/src/img/theme_bignews/s_default_image_block_banner.jpg" alt="Cover image" class="img-fluid w-100 mx-auto" style="padding: 15px;"/>
+            <img src="/mass_mailing_themes/static/src/img/theme_bignews/s_default_image_cover.jpg" alt="Cover image" class="img-fluid w-100 mx-auto" style="padding: 15px;"/>
         </div>
         <div class="s_text_block o_mail_snippet_general pt32 pb32" data-snippet="s_text_block" data-name="Text" style="padding-left: 15px; padding-right: 15px;">
             <div class="container s_allow_columns">