Use shift-scroll to adjust rotation in the clipping module
I was batch processing images and only individual clipping/rotating was left to do (you know, hand-held work...).
I though it would make my life easier to have a quick way to fine tune the image rotation without having to go back and forth between the image area where I can adjust the crop and the module area to adjust the rotation.
I know there is the right-click action, but I sometimes miss a few tens of degrees there, especially if the reference line is a bit short.
This is my first patch so please let me know where I can improve...