How can I undo my vote to close a question? I accidentally closed [this question](https://3dprinting.stackexchange.com/questions/6726/primer-on-3d-printing-design-rules) - it was in the close review queue and (*mea culpa*) half asleep I accidentally hit the close button. It already had three close votes (and one leave open) and as a mod I, accidentally, cast a fourth and definitive close vote.

How can I retract my vote, without voting to reopen and reopening it (which would clear out the close votes and prevent those who previously voted from voting again)? I just want it to go back to being open and having three close votes and one Leave open.