Updates the proximity monitor component (#15836)

* prox component update

* mochi review

* bug fix, makes proximity sensors always active

* GC fixes and removes an unused proc

* Disposal fixes from TM

* fixes runtimes when objects created in nullspace runtimes, fixes portable flasher

* a fresh perspective

* lewcc review

* adds comment about direct loc setting over forceMove

code/modules/assembly/holder.dm

@@ -50,8 +50,6 @@
 	A2.holder = src
 	a_left = A1
 	a_right = A2
-	if(has_prox_sensors())
-		AddComponent(/datum/component/proximity_monitor)
 	name = "[A1.name]-[A2.name] assembly"
 	update_icon()
 	return TRUE
@@ -183,10 +181,10 @@
 			return FALSE
 		if(a_left)
 			a_left.holder = null
-			a_left.loc = T
+			a_left.forceMove(T)
 		if(a_right)
 			a_right.holder = null
-			a_right.loc = T
+			a_right.forceMove(T)
 		qdel(src)