Merge pull request #12416 from Ghommie/Ghommie-cit792

TGUI-next Check Skills menu.

code/__HELPERS/_lists.dm

@@ -69,7 +69,7 @@
 /proc/english_list(list/input, nothing_text = "nothing", and_text = " and ", comma_text = ", ", final_comma_text = "" )
 	var/total = input.len
 	if (!total)
-		return "[nothing_text]"
+		return nothing_text
 	else if (total == 1)
 		return "[input[1]]"
 	else if (total == 2)

code/__HELPERS/cmp.dm

@@ -120,3 +120,8 @@ GLOBAL_VAR_INIT(cmp_field, "name")
 
 /proc/cmp_item_block_priority_asc(obj/item/A, obj/item/B)
 	return A.block_priority - B.block_priority
+
+/proc/cmp_skill_categories(datum/skill/A, datum/skill/B)
+	if(A.ui_category == B.ui_category)
+		return sorttext(A.name, B.name)
+	return sorttext(A.ui_category, B.ui_category)