Currently pressing "k" on a staged file has no effect, though on an individual staged hunk, "k" does the right thing.
For the sake of consistency, I'd like it if "k" would discard all staged hunks when applied at a file level. The current scheme requires one to first unstage the file, then find it in the "Unstaged changes" section, and manually discard just the hunks that were previously staged.
I took a quick look into making this change myself, but didn't get far. -Steve
