disable canvas rotate

add an option to lock canvas rotation or disable the rotation tool.

Disabling all gestures as a solution is unacceptable.

Disabling GPU/OpenGL usage as a solution is unacceptable.

Not all touch devices can disable rotation gestures, so suggesting to users that they use external software is also not an acceptable solution. For example, the Wacom 13HD touch does not have the "Standard Gestures" tab that allows the user to disable rotation gesture. This should instead be available inside photoshop.