Remove HelloWorld and do sweeping

src/views/ContactQRScanShowView.vue

@@ -37,6 +37,8 @@ import QuickNav from "@/components/QuickNav";
 
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const Buffer = require("buffer/").Buffer;
+alertTitle = "";
+alertMessage = "";
 
 @Component({
   components: {
@@ -110,9 +112,5 @@ export default class ContactQRScanShow extends Vue {
       this.qrValue = viewPrefix + vcJwt;
     }
   }
-
-  // This same popup code is in many files.
-  alertTitle = "";
-  alertMessage = "";
 }
 </script>