90 degree image rotation

### Feature Request Buttons (and shortcuts!) to rotate images 90 degrees. Preferrably in the top toolbar, so no more than one click is required. ### Use Case My camera's accelerometer is broken, and so all photos taken in portrait mode show sideways which makes it borderline unusable to me. I can rotate in other apps, but that only works if I use other programs for raw conversion which I don't want to do