(overlay (button-get cite-button 'overlay))
(button-label (notmuch-wash-button-label overlay))
(old-point (point))
+ (properties (text-properties-at (point)))
(inhibit-read-only t))
(goto-char new-start)
(insert button-label)
+ (set-text-properties new-start (point) properties)
(let ((old-end (button-end cite-button)))
(move-overlay cite-button new-start (point))
(delete-region (point) old-end))