* Clean up TitleWindowManager.cs
- I did not like how `OnHostnameChange()` always needed a string even though that string would always just be the hostname, so now it's just part of its function
- The extra function made to just trigger `OnHostnameChange()` are removed. It just runs the right function off the bat.
- Checking for `ClientRunLevel.InGame` for setting the title without the hostname, which means the previous joined server won't appear for a split second before being corrected by the new cvars being set. Or if the server prefers no host name in the titlebar by the time we connect.
* review
* Sus
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