- Fix double HR tag issue on ALC/Posts block settings;

- Change "Drop content here" message to a custom one for Posts/ALC blocks

assets/js/src/newsletter_editor/blocks/container.js

@@ -294,6 +294,7 @@ define([
     templateHelpers: function() {
       return {
         isRoot: this.renderOptions.depth === 0,
+        emptyContainerMessage: this.renderOptions.emptyContainerMessage || '',
       };
     },
   });