tabview: delay selection change until model updates
We need to ensure the page is available from a GtkSelectionModel before we notify or we risk NULL dereferences from the GListModel.
Fixes a crash in libpanel/drafting.
We need to ensure the page is available from a GtkSelectionModel before we notify or we risk NULL dereferences from the GListModel.
Fixes a crash in libpanel/drafting.