Adds two new Save Menu options

• Delete & Quit: Quits the game and deletes the save file. Useful for when you need to test a mod that only takes effect after creating a new game.
• Revert: Quits the game without saving and then immediately reloads it. Does not count as a resurrect. Useful for when you want to make a checkpoint for testing and reload to it after every test.

See: https://github.com/kronosaur/Transcendence/pull/72