R1:dc1106a9b910

Differential - stop showing the shield for "move away" operations

Summary: The shield is just confusing. In one case it doesn't work, and in the other case it just shows you a copy of the file you can see just below except in red. Fixes T4599, T1211. Note T1211 proposed not showing the "move away" file **at all** but I think removing the shield fixes the source of confusion. The code here is a bit if / else if / else if... heavy but this is logically sound.

Test Plan: made a diff where i moved a file…