0.19.7.4 - Perf Improvements, V-Sync Option

Prefer discrete GPU on windows to make sure we aren't getting slowed down by an integrated GPU.
Make v-sync a visible setting, and show v-sync status on dev stats page.
Reduce the maximum windowed size because it was sometimes so big it was hard to close the changelog screen and resize it.
Use single thread option in ebiten which we should already support, which both improves performance and reduces locking.