Add additional labels when dropping tickets to the `done`-column.

When closing a ticket by dragging and dropping it to the done-column of the issue-board, I want to add information about the done-status.

For example resolved, not reproducible, won't fix and other (e.g. requester did not give required feedback) are (for me) a subset of done(or closed). Currently the label of the previous list/column is removed and additional steps are needed to add the tag with information abut the closed status.

Maybe when dragging a ticket over the done-column a list of (user-defined) areas with subgroups (e.g. won't fix) could be displayed. When dropping the ticket on the won't-fix area, the ticket will be marked as done and additionally gets the tag won't fix.

Note: this ticket is based on a comment in reply to a question of @lbennett in gitlab-ce#21360.