94941843e3
PanelMenu.Button listens to key-press-events on the corresponding menu to move focus to neighboring buttons on left/right arrow. In order to allow keynav from the category list on the left to the application list on the right and vice-versa, we may need to suppress the parent behavior depending on the currently focused actor, so overwrite the signal handler accordingly. https://bugzilla.gnome.org/show_bug.cgi?id=693074