When a clip is selected in the timeline but the Media Library is focused, delete key should do nothing
Submitted by Alexander Hunziker
Assigned to Jeff F.T.
When I select a clip in the media library and hit the delete key, I expect that clip to be removed from the media library. Instead, PiTiVi removes whichever clip was last selected from the timeline
Imported from https://bugzilla.gnome.org/show_bug.cgi?id=629208