Nudges in the same direction should be combined in history

Any number of nudges (with the arrow key) in the same direction should be combined into the same history step. So if you nudge 53px to the right with Shift+right arrow 5 times and right arrow 3 times, we should be able to use undo one instead of 8 times to return to where we were. Then switching directions (or doing anything else that creates a history step) should become a new point in history.