refactor: use suspense query instead of serverdata for app widget (#1143)

* refactor: use suspense query instead of serverdata for app widget

* chore: add missing translation for loading tooltip

packages/translation/src/lang/en.ts

@@ -556,6 +556,7 @@ export default {
       next: "Next",
       checkoutDocs: "Check out the documentation",
       tryAgain: "Try again",
+      loading: "Loading",
     },
     iconPicker: {
       label: "Icon URL",