Minor cleanups
Remove temporary hacks for DButton and IMaterial.GetColor
Clear networking queue on map shutdown, not map init
Fixes clientside errors happening before LevelInit hook not being sent to the server
Remove most of deprecated CSteamAPIContext usage on the client
It is removed entirely in some newer version of Steamworks API
Merge Pull Requests
* Pico optimization for cam.Start2D()
* Added list.GetEntry