Rating: use up/down for +/- (tested on 60d & 6d)
Created originally on Bitbucket by Marsu42
Was already merged in Bitbucket before import, marked as merged by the import user
Source changeset not longer availableat the time of import. Commit listwill look empty
This ties "+rating" and new:"-rating" to UP/DOWN keys in play mode, next to the good ol' "+rating" on LV key ... which on 6D is called START/STOP and is inert if lv is disabled. The new rating method only works if zoomed out or it'll scew up navigation around the picture.