Code review comment for lp:~aacid/unity8/new_tabbar

I tested this in silo 003 together with https://code.launchpad.net/~aacid/unity8/new_tabbar/+merge/210453

unity8 results: http://paste.ubuntu.com/7204822/ (3 errors, 0 failures)
ubuntuuitoolkit results: http://paste.ubuntu.com/7204836/ (1 error, 0 failures)

The UITK error happened in settle_before, so is not related to UITK.
The unity errors are also I think not related to the changes here, but it is best if a unity team member has a look at them also.

I also did some manual testing of shorts, gallery, weather, unity, dialer and I did not encounter problems.