Summary:
It always bothered me that adding/removing blame view takes two clicks.
Showing it like this saves a click for almost all transformations, and I think it feels nicer too.
I'm open to adding a user-setting for this (This form or the drop-down), but figured I'd ask first.
Test Plan:
Use buttons to switch modes - make sure text on button matches action.
Repeate with lines highlighted.
Reviewers: epriestley, vrana
Reviewed By: epriestley
CC: jungejason, Two9A, aran, Korvin
Differential Revision: https://secure.phabricator.com/D3499
