Add action to select all notes with same articulation

[jtackaberry]

Given a selected note (or if no selected note, use current articulation at edit cursor on the default channel) have an action to scan all selected items (or the current item in editor if no item selected) and select all notes with the same articulation.

Action should exist in global, MIDI editor, and inline editor contexts.

Use case is quickly remapping articulations, or nudging note offsets for a given articulation.