Changes:
- Added "Toggle last weapon" control.
- Added 'Use lives' cooperative option, defaults to YES.
- Fixed stretching of Netricsa icon texture and moved icon position so it doesn't overlap Armor element.
- Increased forced shoot period for Mental Institution fighters bomb drops so player stands a better chance of defeating Mental Institution without Serious Damage.
- Fixed force field for Jungle Stadium loop that was too small and made it hard to make the loop.
- Fixed a place where players can get stuck at the end of Doomed Canyon level.
- Fixed vertical weapons list not switching weapons when shortcut keys are used.
