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/reagents/reagent_dispenser.dm

@@ -153,7 +153,6 @@
 			usr.visible_message("<span class='notice'>[usr] detaches [rig] from [src].</span>", "<span class='notice'>You detach [rig] from [src].</span>")
 			rig.forceMove(get_turf(usr))
 			rig = null
-			qdel(GetComponent(/datum/component/proximity_monitor))
 			lastrigger = null
 			overlays.Cut()
 
@@ -176,8 +175,6 @@
 				rig = H
 				user.drop_item()
 				H.forceMove(src)
-				if(rig.has_prox_sensors())
-					AddComponent(/datum/component/proximity_monitor)
 				var/icon/test = getFlatIcon(H)
 				test.Shift(NORTH, 1)
 				test.Shift(EAST, 6)