GitLab is used only for code review, issue tracking and project management. Canonical locations for source code are still https://gitweb.torproject.org/ https://git.torproject.org/ and git-rw.torproject.org.
If #9445 (moved) happens TorButton probably needs to support some level of control over Pluggable Transports, maybe the same level of control.
e.g. now trying to speak obfs3, as the user only tried obfs2 and could not connect.
This does not depend on #9445 (moved), controlling PTs would be awesome.