Add buttons to PRE to make editing options explicit
At the moment, to change note length in the piano roll editor, you need to switch back to the main window and select the button there. This is ackward and interrupts your workflow. I would like to add a set of radio buttons so one can select note length in the PRE window.
There are also a number of editing options for inserting notes, but currently they're all accessed by pressing modifier keys. It I would like to add another set of radio buttons so that these options are more visible and can be selected with just a mouse click.