Hotfix 0.1 - Mission, Challenge and Multiplayer Fixes

A couple crash fixes
Fixed input locking during challenges
Fixed immediately completion of some chases
Fixed players not correctly set to assigned role start locations in chases
Fixed Issues with hanging challenge instances causing locking in missions or invalid invites to be accepted
Chase now also ends if players leave and or no players remaining of either team
Fixed demo site mission restarting in multiplayer lobbies when a new player joins
Now any player can invite others to a challenge