Backport #15737
* Fix close button change on delete in simplemde area
Fix issue with close button changing when deleting in the simplemde textarea.
Signed-off-by: Andrew Thornton <art27@cantab.net>
* apply suggestion
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: 6543 <6543@obermui.de>