Make manual entry duration buttons editable.
It would be nice to be able to edit default buttons. Instead of 8h or 9h which I never use to f. eks. 20 min. or 1,5h which are frequent jobb duration. Default buttons could remain if you added a couple buttons where jobb duration could be edited. That comes handy when you have periods with f. eks many 1,5 hour jobs and after some time most of your jobbs are 0,5 hour.