UI: trackball orbit not as responsive when 3dview is full screen

The size of the 3dview affects how responsive Trackball orbiting is. Larger views feel less responsive. This makes orbiting with trackball mode quite slow when sculpting or during other full screen work mode. Turntable Orbit style does not seem to be affected the same and is responsive regardless of window size

To test it:

• In prefs>input switch Orbit Style to Trackball
• Make the 3d view small relative to the screen
• orbit the view and note the speed/responsiveness.

then,

• make a 3d view full screen
• orbit the view and note the speed/responsiveness
• toggling between the small and large view makes the responsiveness easier to notice.

Just suggesting Trackball orbit mode could be tuned to be more responsive when in full screen mode.