Depends on: https://phabricator.kde.org/D17137 ("With https://phabricator.kde.org/D16830 the file menu gets more entries. This is a suggestion to do some cleanup before.")
File menu BEFORE:
AFTER:
Screenshot updates pending:
- Save As... will stay on top level
- Three of the Close actions will get their own submenu
- Final submenu names are not decided yet