[IMP] web: 'Not Archived' becomes 'Active', 'Not published' becomes 'Unpublished'

Another reason why it’s better to change ‘not archived’ into ‘active’ is
because ‘active’ is the functional name of this field in the filter list in list view.

For the rest, it’s just a better en_US way of saying it.

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

@@ -19,7 +19,7 @@ var WidgetWebsiteButton = form_common.AbstractField.extend({
                   .removeClass('text-danger')
                   .addClass('text-success');
         } else {
-            $value.html(_t('Not Published'))
+            $value.html(_t('Unpublished'))
                   .removeClass('text-success')
                   .addClass('text-danger');
         }

addons/website/views/website_templates.xml

@@ -423,7 +423,7 @@
 <template id="publish_management">
     <div groups="base.group_website_publisher" t-ignore="true" class="pull-right css_editable_mode_hidden" t-att-style="style or None">
         <div t-attf-class="btn-group js_publish_management #{object.website_published and 'css_published' or 'css_unpublished'}" t-att-data-id="object.id" t-att-data-object="object._name" t-att-data-controller="publish_controller">
-            <button class="btn btn-danger js_publish_btn">Not Published</button>
+            <button class="btn btn-danger js_publish_btn">Unpublished</button>
             <button class="btn btn-success js_publish_btn">Published</button>
             <button type="button" t-attf-class="btn btn-default dropdown-toggle" t-att-id="'dopprod-%s' % object.id" data-toggle="dropdown">
                 <span class="caret"></span>
@@ -442,7 +442,7 @@
 <template id="publish_short">
     <t groups="base.group_website_publisher" t-ignore="true">
         <div t-attf-class="pull-right js_publish_management #{object.website_published and 'css_published' or 'css_unpublished'}" t-att-data-id="object.id" t-att-data-object="object._name" t-att-data-controller="publish_controller">
-            <button class="btn btn-danger js_publish_btn">Not Published</button>
+            <button class="btn btn-danger js_publish_btn">Unpublished</button>
             <button class="btn btn-success js_publish_btn">Published</button>
         </div>
     </t>