More Intuitive Grace Note Entry

As of right now in 2.1, the methods by which grace notes must be entered is very unintuitive. The user must use the arrows on their keyboard in order to change the pitch of note (and all grace notes are automatically the same pitch as the main note). This is very time consuming and makes grace note entering very difficult for the user. I think that entering the pitch for grace notes should use letters on the keyboard, just like normal notes.