rebaseline_server: UI improvements + set reviewed-by-human on commit

- select/clear/toggle all tests
- display "bugs" column
- set reviewed-by-human on commit
- a couple more tiny fixes, TODOs adjusted, etc.

(SkipBuildbotRuns)

R=senorblanco@chromium.org

Review URL: https://codereview.chromium.org/44123004

git-svn-id: http://skia.googlecode.com/svn/trunk@11970 2bbb7eff-a529-9590-31e7-b0007b416f81
3 files changed