Gitlab Access token > check validity
Users of the AntwoordenCMS may only make a gitlab issue if they have a Gitlab Access Token (for security reasons).
If there is no Gitlab Access Token, the button 'Make issue' does not show.
However, if there is a GitLab Access Token but it has expired or is otherwise invalid, the button 'Make issue' does show up but doesn't make a Gitlab Issue. It is hard to see for users, so lots of hard work goes wasted.
Solution: check validity of Gitlab Access Token and give warning text when it is not valid.