Option to reverse mouse orbit on X-axis.

For the Perspective camera in the editor, there are several options for mouse control in the preferences, but the one that’s missing (and completely throws me) is being unable to invert the Orbit X.
So in my mind when I hold Alt+LMB I want to move the camera in the direction the mouse is moving (as opposed to rotating the world around the object that’s in focus), I get that may be uncommon, but there must be enough people who use 3D cameras in this way to make it worth having as an option.