Feature/o31

[Blizzardsev]

Introduces the following:

• New event for Halloween (HAPPY+), with an unlock method for the jn_magical_girl_cosplay outfit and new poem jn_natsuki_hallows_end (LOVE+ only)
• Added new sunrise/sunset settings, allowing players to configure sunrise and sunset to make more sense for their physical location
• Minor refactor for sticker/popup code
• Removed some unused sound effects
• Space classroom music is now an option in the custom music menu when browsing tracks (like Vacation)
• Added percentage values to music/sound effects settings
• Added two new desk items:
  • jn_renpy_for_dummies_closed
  • jn_pumpkins

Resolves the following:

• Bug where the quitting dialogue would appear when trying to force quit in the hotkeys menu