Loading Screen Cancel Feature

[FlintMcgee]

Can we get a "Cancel Connection" button while loading into a server? Joining the wrong one happens too often, and waiting for it to finish is a pain. Hitting "Esc" doesn’t work, so a proper cancel option would be awesome.

Also, the progress bar isn’t accurate when it says "Mission Load Done," it’s still loading assets, and it feels like the game froze. A more accurate bar or better feedback would help a lot