Prototype 4.1 - Improvements and fixes to custom inputs

Inputs

• The game will not reset players and inputs when trying again.
• The game will save your custom input and load them back up when launching the game.
• You can Try Again by pressing Start on a controller.

Other

• Reduced the camera's border so there is less wasted space when zoomed far out.
• Added a minimum camera size so it doesn't zoom as far in on few objects.
• Added popups for healing between waves so it's easier to gage how useful (or not) Regeneration is. For now it looks like the other popups but with a + sign.