Revert "Windows render is started before anything else, but they wait for other renders to finish before drawing"

This reverts commit 25fbc024d8b3d5f68b003fe037c1a635f9595050.
Revert "Still playing around with fences"

This reverts commit 7084302f79296cce79b740a7ad561eea305b9757.
Revert "Windows are now rendering in their own threads, added a sync object to ensure Cameras are rendered"

This reverts commit 70d4f0bfa6f8ccb09bd461e708ff90b35851ac0c.