Content editing: Correct handling of read-only of name field when A action is removed in SendingContentNotification (#20072)

Set header name to readonly

Author: bjarnef

src/Umbraco.Web.UI.Client/src/common/directives/components/content/umbvariantcontent.directive.js

@@ -109,7 +109,7 @@
 
         function onAppChanged(activeApp) {
             // set the name field to readonly if the user don't have update permissions or the active content app is not "Content" or "Info"
-            const allowUpdate = vm.editor.content.allowedActions.includes('A');
+            const allowUpdate = vm.content.allowedActions.includes('A');
             const isContentBasedApp = activeApp && contentAppHelper.isContentBasedApp(activeApp);
             vm.nameReadonly = !allowUpdate || !isContentBasedApp;
         }