MAGETWO-90441: Allow inline editing of Heading from stage

- rename toolbar component and template

Author: anthoula

app/code/Magento/PageBuilder/view/adminhtml/web/js/toolbar.js renamed to app/code/Magento/PageBuilder/view/adminhtml/web/js/content-type-toolbar.js

@@ -31,7 +31,7 @@ export default class Toolbar {
      * @returns {string}
      */
     get template(): string {
-         return "Magento_PageBuilder/toolbar";
+         return "Magento_PageBuilder/content-type-toolbar";
     }
 
     /**

app/code/Magento/PageBuilder/view/adminhtml/web/js/content-type/heading/preview.js

@@ -7,9 +7,9 @@ import $ from "jquery";
 import events from "uiEvents";
 import _ from "underscore";
 import ContentTypeConfigInterface from "../../content-type-config.d";
+import Toolbar from "../../content-type-toolbar";
 import ToolbarOptionInterface from "../../content-type-toolbar/option.d";
 import ContentTypeInterface from "../../content-type.d";
-import Toolbar from "../../toolbar";
 import ContentTypeReadyEventParamsInterface from "../content-type-ready-event-params.d";
 import ObservableUpdater from "../observable-updater";
 import BasePreview from "../preview";