4/4 bugfixes + balance

- Fixed bug that causes you to fall through floor at end of Ghronto fight
- Fixed some elevator UI being unreliable
- Made it so you can grab AK bolt from any angle

Proof I have mercy:
- Reduced number of enemy boats in great sea
- Added checkpoint before phase 2 of Sintho fight

EDIT:
- Fixed broken vortex control UI
- Fixed AK47 ammo returning to belt even when magazine is partially empty
- Fixed golden BAMM showing up without all achievements complete