A small convenience update!

• Flashback mod updated, now there should be fewer bugs and crashes! Another important thing is that Flashback has started to show which mods can interfere with it during rendering.

• Some mods are now optional and disabled by default! But if anything, you can quickly turn them on in almost any launcher! Mods that have become optional: Distant Horizons, Essential Mod, (Essential Mod may conflict with Flashback, which can lead to crashes during scene rendering!)