Fallback app menu not being shown in Fedora 30
Testing the upcoming Fedora 30 release, I see apps that should have the fallback app menu in their header bars, but are missing it. For example:
In this case Characters is the 3.30.0 version and so hasn't migrated its menu items from the app menu. In this situation, my understanding was that GTK would show the app menu so they're not lost altogether. There are other examples of this, including Rhythmbox.