ApplicationList: Reset app menu screen when loading watch face

This prevents the application list from loading in the last used screen
and instead goes back to the first screen whenever the watch face is
loaded.

Fixes #2006

Author: vkareh

src/displayapp/DisplayApp.cpp

@@ -446,6 +446,7 @@ void DisplayApp::LoadScreen(Apps app, DisplayApp::FullRefreshDirections directio
       else {
         currentScreen.reset(userWatchFaces[0].create(controllers));
       }
+      settingsController.SetAppMenu(0);
     } break;
     case Apps::Error:
       currentScreen = std::make_unique<Screens::Error>(bootError);