Feature Request: Mouse Preferences

This has already been discussed in other threads, but it would be really handy
for the user to be able to change mouse behavior for Pan/Zoom/Rotate functions.
Many 3D CAD packages allow for this.

For example, in Acrobat 3D, there does not seem to be any mouse shortcut for
panning. I have to click on the pan button. I find the extra step of clicking on
the pan button to pan, then clicking on rotate button to rotate the model to be
a waste of time and annoying.

Holding the left and right mouse buttons then dragging the mouse will result in
panning.