Makes it more clear if you've voted to reopen/delete/undelete on a Stack Exchange post.
Made with Tampermonkey. Conflicts with other script managers may occur, but I highly doubt it.
Link: Install
Effectively completes this feature request.
If you've voted to delete something, the delete button is replaced with "Retract Delete (votes)" text:
Same applies if you've already voted to undelete something:
Also makes the prompt popup a bit more eyecatching if you're about to retract your vote:
Compatible with the Stack Overflow Unofficial Patch (SOUP). Might submit a pull request for it later idk.