Multiplayer UI Fixes — Dead Metal Steam update #549750

There have been a lot of issues from people trying to make and join co op games, this patch seeks to be a bit of a bandaid before a more permanent solution is found. ---Bugfix--- -Players no longer need to restart game in order to get correct data -Players can now join any slot they want in any order other than the host being forced into slot 1 -Reloading bugs fixed when a player DCs -Bug with loading screen appearing without a mission selected yet fixed ---Coming Soon--- -The ability to save your name to your slot in MP so its easier to see who takes up which slot when you are rejoining to play at a later date ---Coming Far--- -The ability for one player to control multiple characters so there are always 4 players -Increase the amount of characters you can have in MP to 8 per person per save up from 4 The coming fa...