change the notification detection to our own variables, and save the selected time

src/components/UserNameDialog.vue

@@ -46,11 +46,14 @@ import { MASTER_SETTINGS_KEY } from "@/db/tables/settings";
 export default class UserNameDialog extends Vue {
   $notify!: (notification: NotificationIface, timeout?: number) => void;
 
-  callback: (name?: string) => void = () => {};
+  callback: (name: string) => void = () => {};
   givenName = "";
   visible = false;
 
-  async open(aCallback?: (name?: string) => void) {
+  /**
+   * @param aCallback - callback function for name, which may be ""
+   */
+  async open(aCallback?: (name: string) => void) {
     this.callback = aCallback || this.callback;
     const settings = await retrieveSettingsForActiveAccount();
     this.givenName = settings.firstName || "";