^another reason why this feature should be added, coz it's efficient and safe. Why?
If we're mapping, and forget that we did because we hide it, we can use the tray options to safely save the map and close the osu without reloading the whole map db.
If we're playing, and forget that we did, we can also use the tray to safely exit the game without having to exit the map and evantually, reload everything again.
The way to kill the process via task manager is not good at all. We may lose files we did when mapping, or small occasion of corrupting the map db without our consent.