Implemented expected-duration, a component that shows ' / xx:xx' or '', possibly showing the build time of the previous successful build.
Update build_head.cljs
prevent project settings from getting clipped
Merge pull request #3191 from circleci/expected_time

Implemented expected-duration
Merge commit '2b0162d611a80bb081efb2db3f637ccc8195d31d'
Merge commit 'a61c810e7055fb9a0581b9608db011ae985d8481'