Enabling `use_snap_rotate` in 3D viewport caused rotation in sequencer
to apply snapping. Rotation snapping was using mixed snapping functions,
which aren't implemented in sequencer.
Ignore affect rotation/scale tool setting property and force increment
snapping to be used with these transform modes.
Pull Request: https://projects.blender.org/blender/blender/pulls/133272
30f3eaa2a5