Please clear Add Comment dialog window after submitting the comment
Please make text field in Add comment window by default. Currently, if user inputs some text, send the comment or just close add comment window, and then reopen add comment window, the text field contains recently typed in text.
Found in Min 12.1.x. and 12.2.0
Please see movie: ownCloud/Disease maps/Minerva docs/test-issues/12.2.0 test/issue680_comment