Enable some extra lints for compass app client (#2560)

Enable a few more lints that were mostly followed already for
consistency.

compass_app/app/lib/utils/command.dart

@@ -79,7 +79,7 @@ class Command0<T> extends Command<T> {
 
   /// Executes the action.
   Future<void> execute() async {
-    await _execute(() => _action());
+    await _execute(_action);
   }
 }