General
- Online play is now thin border instead of borderless, and uses a more widely-accepted code path to maintain the window's position when it changes. (It seems not all graphics drivers support querying client window position, which is kinda nuts!) Hopefully this fixes some people's freezing/crashing issues when it switches the window style, plus it's slightly prettier. Tell me in the comments! If there are still issues, I'll keep lookin' at it...
- Disabled Alt-Space in online play just in case some versions of Windows somehow allowed it with a borderless window.