Engine v5.1.5

A patch to Connection.

• Bloom is now much more performant.
• Finished combat effects are cleaned up correctly in multiplayer games instead of accumulating and slowing the room down.
• Custom event listeners and sound-finished hooks now work on player-owned and shared-room objects.
• Visiting players can get in and drive vehicles with the correct seat and follow camera.
• Games on Retina displays are faster.
• Shadows are cheaper for inactive lights.
• Custom paired controls now follow the order you write them, so reversing a pair reliably reverses the control.