separate image gallery edit from images

Author: bso-odoo

addons/html_builder/static/src/interactions/image_gallery.edit.js

@@ -9,10 +9,7 @@ export class ImageGalleryEdit extends Interaction {
         },
     };
     setup() {
-        const containerEl = this.el.querySelector(
-            ".container, .container-fluid, .o_container_small"
-        );
-        this.renderAt("html_builder.empty_image_gallery_alert", {}, containerEl);
+        this.renderAt("html_builder.empty_image_gallery_alert", {}, this.el);
     }
     onAddImage() {
         const applySpec = { editingElement: this.el };

addons/html_builder/static/src/interactions/image_gallery.edit.xml

@@ -2,9 +2,11 @@
 <templates xml:space="preserve">
 
 <t t-name="html_builder.empty_image_gallery_alert">
-    <div class="alert alert-info o_empty_gallery_alert text-center o_not_editable" contentEditable="false">
-        <i class="fa fa-plus-circle"/>
-        <span class="o_add_images"> Add Images</span>
+    <div class="container">
+	    <div class="alert alert-info o_empty_gallery_alert text-center o_not_editable" contentEditable="false">
+	        <i class="fa fa-plus-circle"/>
+	        <span class="o_add_images"> Add Images</span>
+	    </div>
     </div>
 </t>