Bugfix: Adds UI button for blob splitting (#15907)

* A real Blob Ross!

* Adds a check for offspring and if blob has split

code/_onclick/hud/blob_overmind.dm

@@ -132,6 +132,8 @@
 	if(isovermind(usr))
 		var/mob/camera/blob/B = usr
 		B.split_consciousness()
+		if(B.split_used) // Destroys split proc if the split is succesfully used
+			qdel(src)
 
 /datum/hud/blob_overmind/New(mob/user)
 	..()
@@ -194,6 +196,8 @@
 	using.screen_loc = ui_storage2
 	static_inventory += using
 
-	using = new /obj/screen/blob/Split()
-	using.screen_loc = ui_acti
-	static_inventory += using
+	var/mob/camera/blob/B = user
+	if(!B.is_offspring) // Checks if the blob is an offspring, to not create split button if it is
+		using = new /obj/screen/blob/Split()
+		using.screen_loc = ui_acti
+		static_inventory += using

code/game/gamemodes/blob/blobs/core.dm

@@ -117,13 +117,13 @@
 
 	if(C && !QDELETED(src))
 		var/mob/camera/blob/B = new(loc)
+		B.is_offspring = is_offspring
 		B.key = C.key
 		B.blob_core = src
 		overmind = B
 		color = overmind.blob_reagent_datum.color
 		if(B.mind && !B.mind.special_role)
 			B.mind.make_Overmind()
-		B.is_offspring = is_offspring
 
 /obj/structure/blob/core/proc/lateblobtimer()
 	addtimer(CALLBACK(src, .proc/lateblobcheck), 50)