window: Enable back mouse button to navigate backwards
Creates the same effect as having pressed "Alt+Left" combination. Override button_release_event to handle mouse button 8. https://bugzilla.gnome.org/show_bug.cgi?id=771934
Creates the same effect as having pressed "Alt+Left" combination. Override button_release_event to handle mouse button 8. https://bugzilla.gnome.org/show_bug.cgi?id=771934
mentioned in merge request gnome-games!2