MC-3917: Reset button doesn't work

Author: irenelagno

app/code/Magento/PageBuilder/view/adminhtml/web/js/form/element/block-chooser.js

@@ -43,7 +43,8 @@ define([
                 }
             },
             listens: {
-                id: 'updateFromServer'
+                id: 'updateFromServer',
+                '${ $.provider }:data.reset': 'reset'
             }
         },
 
@@ -55,6 +56,15 @@ define([
                 .observe('id meta errorMessage displayMetadata');
         },
 
+        /**
+         * Resets metadata
+         *
+         * @returns void
+         */
+        reset: function () {
+            this.meta({});
+        },
+
         /**
          * Updates the block data from the server
          *