Some more NOU improvements

[Booplicate]

Changes:

• Allow to ask to change house rules after the game is over
• Delayed desk sprite init to init 500, also guardrailed global map access with a try/except
• Fixed an issue where Monika wouldn't start a minigame she picked in the mas_mood_bored event
• Implemented a new house rules thanks to @Legendkiller21
• • Allows to reflect a +2 or +4 with a +4, and reflect skips using a skip of any colour

Testing:

• Test the new way of changing house rules
• • After Monika wins a game with points
• • After player wins a game with points
• • After Monika wins a game without points
• • After player wins a game without points
• • • For all of the above, test both cases where you continue to play AND leave after changing the rules
• • • You can use renpy.get_return_stack() to verify we're not adding an extra call stack
• Verify desk sprites still work as before
• Verify Monika can start any game from mas_mood_bored and the games have correct names (NOU should be capitalised, the rest not)
• Verify the new house rule works and Monika still plays good with and without it