[IMP] website_blog: make footer oe_structure placeholder less visible

task-2144335

addons/website/static/src/scss/website.edit_mode.scss

@@ -47,6 +47,9 @@ $-editor-messages-margin-x: 2%;
     &.oe_structure.oe_empty, &[data-oe-type=html], .oe_structure.oe_empty {
         &:empty {
             @extend %o-editor-messages;
+            &.oe_structure_small {
+                padding: 15px 0px;
+            }
         }
         > .oe_drop_zone.oe_insert:not(.oe_vertical):only-child {
             @extend %o-editor-messages;

addons/website_blog/views/website_blog_templates.xml

@@ -34,7 +34,7 @@
 
             <!-- Droppable-area shared across all blog's pages -->
             <t t-set="oe_structure_blog_footer_description">Visible in all blogs' pages</t>
-            <div class="oe_structure"
+            <div class="oe_structure oe_structure_small"
                 id="oe_structure_blog_footer"
                 t-att-data-editor-sub-message="oe_structure_blog_footer_description"/>
         </div>