Good idea. I always move the Windows task bar to the top of the screen for the same reason.
This doesn't exactly solve your problem, but it could streamline things a bit as long as the interface is the way it is.
Keep your mouse pointer on the right side of the screen, and use the arrow keys to navigate images. For example, if you're done editing Exposure, press Enter once so that Exposure is no longer highlighted. Now you can use the arrow keys to move to the next or previous image while leaving the pointer over the controls on the right.
The problem I have with that scenario is that I usually just use the trackpad on my laptop. The enter key and arrow keys are on the right side of the keyboard. But in order to do this, with my right hand either on the mouse or trackpad means taking my fingers off the track pad or my hand off the mouse, pressing enter, then the arrow down key, then going back to the mouse/trackpad. Or, I'd have to use my left hand across the keyboard to use those keys, which would not be very comfortable and would be in the way of the track pad. Doing it this way would probably take even more time than moving the mouse across the screen.
It would just be easier and faster to to keep my hand on the mouse, move a fraction of an inch over and click the next image and continue making adjustments.
I'd be somewhat content if I could use the tab key on the left side of the keyboard to navigate to the next image but currently the tab key only gets to the next image adjustment field.