Merge pull request #11323 from Ghommie/Ghommie-cit600

Porting a couple material datums code updates and fixes.

code/modules/research/designs.dm

@@ -53,7 +53,7 @@ other types of metals and chemistry for reagents).
 	for(var/i in materials) //Go through all of our materials, get the subsystem instance, and then replace the list.
 		var/amount = materials[i]
 		if(!istext(i)) //Not a category, so get the ref the normal way
-			var/datum/material/M =  getmaterialref(i)
+			var/datum/material/M =  SSmaterials.GetMaterialRef(i)
 			temp_list[M] = amount
 		else
 			temp_list[i] = amount