Save a rich field directly on the entry view
I really apreciatte Memento app, this app changed my organization and workflow to a much better option! I use Memento desktop version to organize my daily tasks with the new calendar view and to register informations about my exercise routine, car fuel, and many other things.
And I use a lot of rich fields to record bigger informations.
So, my suggestion is: add a button on desktop view that could be used to save a rich field edition directly, without the necessity to do a double click over an entry, edit it and then save. Just click once on an entry, edit the rich field directly on the view window and click on a save button located on the rich field icon bar, per exemple.