Notes
* you cant edit UV's in the image window in "UV Face Select" mode. (removed UV from the name)
* going into Face Select mode no longer adds UV's and does not need UV's to work.
* The UV Calculation menu is now in editmode (Alt+W)
Todo..
* Image replace - partly broken in stable also.
* Rotate/Mirror UV/VCol are still only in Face Select mode.
* Hide/Reveal is not quite right, (issue with editmode flushing)
e8a808da24