UI update - eye "fix" for cycles (Patreon)

Small UI update that does 2 things:

1. prevents mirror mode from being changed while in edit mode as it can cause some issues. Button is replaced with a warning in edit mode.

2. removes the subsurface entirely for the eyes in cycles. It was set as .005 for both eevee and cycles and gave some pop to the eyes but I see too many renders with yellowish eyes which is the result of subsurface in cycles so I'd rather disable it completely.

UI version is now 2.1.37

Download Here