[ci skip]

This needs to be done that way, because the committed_at can be null for some pretty old commits.

The CI prefers to receive the projects added to CI first

Commit messages are now additionally truncated after the first line.
Before, a commit message's body was attached behind the subject which
made messages hardly readable in some cases.

Replaced .show and .hide with .removeClass('hide') and .addClass('hide') (Like done for #192 in MR 177)

- check if user has manage access to project
- don't cache result of authorized_projects, because it's serialised with User object
- clear user sessions

Disable link to runner if it's not assigned to specific project: fixes 404 when clicking on available runner from project's page

It allows to ignore status of specific job when computed for commit