1f7b6c1d6f
Since not chaining up in gtk_widget_show/gtk_widget_hide is not allowed, we can't just implicitly delay the hiding in GtkPopover's hide implementation. Fix this by introducing gtk_popover_popup() and gtk_popover_popdown() to show or hide a popover with transition and revert GtkPopover's show/hide implementation to apply their effect without the transition. https://bugzilla.gnome.org/show_bug.cgi?id=769706