Added daily challenge indicator to item stacks in class selection UI

Added exit particle effects for bullets

Optimized how the window title is updated

Optimized bot model rendering

Speed in which blood particles fade is now based on graphics settings

Made improvements to how bullets traverse water

Updated Connecting stage graphic for intro UI

Made improvements to the audio for the PIAT

Made improvements to de-spawn time of corpses for fast graphics

Fixed entity bullet impacts playing twice for source player