Improvements for traps, add new curse types

[HylianFreddy]

• Add 2 new curses:
  • Invisible Actors (to parallel the Invisible Terrain curse);
  • Missing Navi, preventing not only Navi interactions, but also targeting enemies and objects.
• Allow curses to override active curse, instead of making every curse trap become a bomb/scale trap when a curse is already active;
• Reset Link's action when opening ice trap chests, instead of forcing a falling state to interrupt the get item animation;
• Don't draw slash effect during sword curse, to give a visual indicator of the effect
  • While implementing this, I've also thrown in an extra option to the Trail Duration setting, called "Space Tearing", which keeps the trail effects visible for around 8 seconds.
• Improve receiving multiple traps in a row from pending overrides (like randomized rupees or hearts), because previously they would often reuse the same type due to sharing the same hash value as the last trap;
• General improvements to trap code.