Shadow rendering issue

[p4rty4nimAl]

Steps to reproduce:

• Have an element (not a compound) in your inventory, in the slot before a block.
• If there is a regular item (not an element or BlockItem) before the block, the rendering issue disappears.
• Otherwise, the shadow on the block does not appear.
• See the screenshot for an example:
  

[nok-ko]

Looks like the shadow rendering gets turned off here:

ChemLib-Fabric/src/main/java/com/smashingmods/chemlib/client/ElementRenderer.java

Lines 37 to 39 in 99e4088

	if (gui) {
	DiffuseLighting.disableGuiDepthLighting();
	}

And is never turned back on. I may write a PR to fix this tonight.

[p4rty4nimAl]

It appears turning it back on at the end of the function seems to render a shadow on the item too, making them much darker - which is probably why it is there in the first place.

But then again, I'm not experienced with rendering.