Allow multiple instances of a part of a lyric to be updated when editing in the Cue

Since there seems to be valid scenarios for wanting an update made when editing a lyric cue to apply to every instance of a part in the cue (like fixing a typo in a chorus or refrain), but also not updating every instance - slight variations of the chorus which previously required Chorus 1 and Chorus 2, allow the editor to choose either at a global level (all their changes are one way or the other) or when they complete the edit (through a right-click "Apply to all") whether every instance should be updated. Personally I will continue to have Chorus 1 and Chorus 2 to handle the variations, and would always want my edits to apply to every instance