AjaxUndo

AjaxUndo adds an Ajax undo link next to the normal undo link on page histories and diffs. This undoes the selected revision without having to view and manually save the edit.
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* If you wish to mark edits made through AjaxUndo as minor, use window.AjaxUndoMinor = true; in your personal or sitewide JavaScript page.
* If you wish to change the default summary left by AjaxUndo, use window.AjaxUndoSummary = 'Insert your default summary here.'; in your personal or sitewide JavaScript page.
* If you would rather be asked on every use of AjaxUndo for an edit summary, use window.AjaxUndoPrompt = true; in your personal or sitewide JavaScript page. The summary in window.AjaxUndoSummary, if set, will be shown in the prompt by default.