UI: Fix editing widget FQN

ui-ngx/src/app/modules/dashboard/dashboard-pages.routing.module.ts

@@ -38,7 +38,7 @@ export class WidgetEditorDashboardResolver implements Resolve<Dashboard> {
   resolve(route: ActivatedRouteSnapshot): Dashboard {
     const editWidgetInfo = this.utils.editWidgetInfo;
     const widget: Widget = {
-      typeFullFqn: 'customWidget',
+      typeFullFqn: 'system.customWidget',
       type: editWidgetInfo.type,
       title: 'My widget',
       image: null,

ui-ngx/src/app/modules/home/components/widget/widget-component.service.ts

@@ -86,7 +86,7 @@ export class WidgetComponentService {
           {
             widgetName: this.utils.editWidgetInfo.widgetName,
             bundleAlias: 'customWidgetBundle',
-            fullFqn: 'customWidget',
+            fullFqn: 'system.customWidget',
             deprecated: false,
             type: this.utils.editWidgetInfo.type,
             sizeX: this.utils.editWidgetInfo.sizeX,