Model notifyListeners closes EndDrawer

[cedarbob]

My app's home page opens an EndDrawer in a ScopedModelDescendant for editing app settings. When the user makes a change affecting the main page widgets, the drawer widget calls a model method which uses notifyListeners to keep the main UI up to date. The problem is that this immediately closes the EndDrawer. If I don't call notifyListeners in this way, the main UI is stale when the drawer closes.