optional lock palette drawer position

Occasionally, but enough to be frustrating, especially with Wacom pen usage, palette drawers get accidentally moved out of position.

Solution suggested:

add to palette drawer controls, in same place as rename palette drawer name, add a checkbox, that when checked, locks the palette drawer in its current position.

Since the position is already known/recorded, it would be easy to incorporate a "lock" code checkbox (built-in to the OS, similar to used in many other programs).

Doug Schafer