[FIX] website, mass_mailing: restore original FieldTextHtml widget -> FieldTextHtmlFrame only for mass_mailing

The new `summernote in iframe` version of the
FieldTextHtml widget is not ready for prime time
yet.
Usability is not very good when used as a replacement
for the previous html editor, especially in email
composer windows, and initial loading is very slow.

For now we only enable it as FieldTextHtmlFrame for
mass_mailing templates, where isolation of the
style is important (so that recipients receive the
exact same result as was displayed on screen, without
side-effects caused by backend/frontend style)

In master the summernote version will be improved
and the old CLE version will be dropped completely.

addons/mass_mailing/views/email_template.xml

@@ -30,7 +30,7 @@
                         </group>
                         <notebook>
                             <page string="Body">
-                                <field name="body_html" nolabel="1" options="{'editor_url': '/website_mail/field/email_template'}"/>
+                                <field name="body_html" nolabel="1" options="{'editor_url': '/website_mail/field/email_template'}" widget="html_frame"/>
                                 <field name="attachment_ids" widget="many2many_binary"/>
                             </page>
                         </notebook>

addons/mass_mailing/views/mass_mailing.xml

@@ -261,7 +261,7 @@
                         </div>
                         <notebook>
                             <page string="Popup Content">
-                                <field name="popup_content" options="{'editor_url': '/website_mass_mailing/field/popup_content'}"/>
+                                <field name="popup_content" options="{'editor_url': '/website_mass_mailing/field/popup_content'}" widget="html_frame"/>
                             </page>
                         </notebook>
                     </sheet>
@@ -443,7 +443,7 @@
                         </group>
                         <notebook>
                             <page string="Mail Body">
-                                <field name="body_html" options="{'editor_url': '/website_mail/field/email_template'}"/>
+                                <field name="body_html" options="{'editor_url': '/website_mail/field/email_template'}"  widget="html_frame"/>
                                 <field name="attachment_ids"  widget="many2many_binary" string="Attach a file"/>
                             </page>
                             <page string="Options">

addons/website/static/src/css/website.backend.css

@@ -4,7 +4,7 @@
 .oe_WidgetWebsiteButton.success .oe_unpublish {
     display: none;
 }
-.oe_form_field_html iframe {
+.oe_form_field_html_frame iframe {
     display: block;
     width: 100%;
     border: 0;
@@ -12,7 +12,7 @@
     margin: 0;
     min-height: 300px;
 }
-.o_form_FieldTextHtml_fullscreen .oe_form_field_html iframe {
+.o_form_FieldTextHtml_fullscreen .oe_form_field_html_frame iframe {
     position: absolute !important;
     left: 0 !important;
     right: 0 !important;
@@ -22,7 +22,7 @@
     z-index: 1001 !important;
     border: 0;
 }
-.o_form_FieldTextHtml_fullscreen .modal .oe_form_field_html iframe {
+.o_form_FieldTextHtml_fullscreen .modal .oe_form_field_html_frame iframe {
     top: 0 !important;
 }
 .o_form_FieldTextHtml_fullscreen .oe_webclient *, .o_form_FieldTextHtml_fullscreen .modal * {

addons/website/static/src/js/website.backend.js

@@ -15,11 +15,12 @@ instance.web.form.WidgetWebsiteButton = instance.web.form.AbstractField.extend({
 });
 instance.web.form.widgets = instance.web.form.widgets.extend({
     'website_button': 'instance.web.form.WidgetWebsiteButton',
+    'html_frame': 'instance.web.form.FieldTextHtmlFrame',
 });
 
 var widget = instance.web.form.AbstractField.extend(instance.web.form.ReinitializeFieldMixin);
-instance.web.form.FieldTextHtml = widget.extend({
-    template: 'FieldTextHtml',
+instance.web.form.FieldTextHtmlFrame = widget.extend({
+    template: 'FieldTextHtmlFrame',
     start: function () {
         var self = this;
 

addons/website/static/src/xml/website.backend.xml

@@ -8,8 +8,8 @@
         </div>
     </t>
 
-    <t t-name="FieldTextHtml">
-        <div class="oe_form_field oe_form_field_html oe_form_embedded_html" t-att-style="widget.node.attrs.style">
+    <t t-name="FieldTextHtmlFrame">
+        <div class="oe_form_field oe_form_field_html_frame oe_form_embedded_html" t-att-style="widget.node.attrs.style">
             <iframe/>
         </div>
     </t>