TRUE if a page has been poppedNavigationView.pop
bool pop()Pops the visible page from the navigation stack.
Does nothing if the navigation stack contains less than two pages.
If [adw.navigation_view.NavigationView.add] hasn't been called, the page is automatically removed.
signalNavigationView::popped will be emitted for the current visible page.
See [adw.navigation_view.NavigationView.popToPage] and [adw.navigation_view.NavigationView.popToTag].