No way to tell whether I have starred a project or not

The button should at least change color or seem pushed.

\cc @dzaporozhets @creamzy

Added ~19492 label

Related to gitlab-org/gitlab-ce#2876

Added frontend and removed ~19492 labels

@creamzy

/cc @jschatz1 this one with star/unstar

Reassigned to @jschatz1

mentioned in merge request !2156 (merged)

Status changed to closed by merge request !2156 (merged)

mentioned in commit aa712e2b

mentioned in merge request !14785