- selection = Do something to all selected entities.
- reverse_selection = Do the opposite to all selected entities.
- alt_selection = Do something to all not selected entities.
- alt_reverse_selection = Do the opposite to all not selected entities.
Another potentially usecase could be the upgrade planner:
- selection = Upgrade
- reverse_selection = Downgrade
- alt_selection = Cancel upgrades (right now this cancels all up- and downgrades)
- alt_reverse_selection = Cancel downgrades