Initial work on being able to move the stage by dragging the mouse.
Remove debugging print.
Get camera drag motion to work properly (almost, does not correct for the current magnification.
Change to QStageThread as the stage.
Cleanup and refactor. Get drag events to work properly. Adjust stage motion based on camera orientation.
Add stage axis tranpose parameter.
Remove joystick lockout button.
Fix bug in handleAdd introduced by recent changes.