Piano Roll Editor: No boundary check on "Velocity" and "Length"
The value spinboxes for setting Velocity and Length in the Piano Roll Editor does not have correct boundary checks.
Velocity for 'User' can be set to anything between -1000 and 1000. Should be 0 - 127.
Length can be set to negative values, which does not male sense. entering directly it can be set to 1000, but it can be increased even more by using the spin arrows.
Furthermore the velocity setting in the Inspector and the PRE are not identical.