fix(orbiting): assorted fixes

code/modules/mob/living/deity/deity_tracking.dm

@@ -24,7 +24,6 @@
 		stop_follow()
 	eyeobj.setLoc(get_turf(L))
 	to_chat(src, "<span class='notice'>You begin to follow \the [L].</span>")
-	following = L
 	register_signal(L, SIGNAL_MOVED, /mob/living/deity/proc/keep_following)
 	register_signal(L, SIGNAL_QDELETING, /mob/living/deity/proc/stop_follow)
 	register_signal(L, SIGNAL_MOB_DEATH, /mob/living/deity/proc/stop_follow)
@@ -34,7 +33,6 @@
 	unregister_signal(following, SIGNAL_QDELETING)
 	unregister_signal(following, SIGNAL_MOB_DEATH)
 	to_chat(src, "<span class='notice'>You stop following \the [following].</span>")
-	following = null
 
 /mob/living/deity/proc/keep_following(atom/movable/moving_instance, atom/old_loc, atom/new_loc)
 	eyeobj.setLoc(new_loc)

code/modules/mob/mob_movement.dm

@@ -185,9 +185,8 @@
 			var/datum/orbit/O = thing
 			O.Check()
 
-	var/datum/orbit/orbit = orbiting?.resolve()
-	if(istype(orbit))
-		orbit.Check()
+	if(istype(orbiting))
+		orbiting.Check()
 
 	SEND_SIGNAL(src, SIGNAL_MOVED, src, old_loc, loc)
 

code/modules/mob/observer/ghost/ghost.dm

@@ -24,7 +24,6 @@ GLOBAL_LIST_EMPTY(ghost_sightless_images)
 	var/started_as_observer //This variable is set to 1 when you enter the game as an observer.
 							//If you died in the game and are a ghost - this will remain as null.
 							//Note that this is not a reliable way to determine if admins started as observers, since they change mobs a lot.
-	var/atom/movable/following = null
 	var/glide_before_follow = 0
 
 	var/admin_ghosted = FALSE
@@ -442,14 +441,10 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 
 // This is the ghost's follow verb with an argument
 /mob/observer/ghost/proc/ManualFollow(atom/movable/target)
-	if(!target || target == following || target == src)
+	if(!istype(target) || target == src)
 		return
 
 	stop_following()
-	following = target
-	register_signal(following, SIGNAL_MOVED, nameof(/atom/movable.proc/move_to_turf))
-	register_signal(following, SIGNAL_DIR_SET, nameof(/atom/proc.recursive_dir_set))
-	register_signal(following, SIGNAL_QDELETING, nameof(.proc/stop_following))
 
 	var/orbitsize
 	if(target.icon)
@@ -459,25 +454,25 @@ This is the proc mobs get to turn into a ghost. Forked from ghostize due to comp
 		orbitsize = world.icon_size
 	orbitsize -= (orbitsize / world.icon_size) * (world.icon_size * 0.25)
 
-	var/datum/orbit/orbit = orbiting?.resolve()
-	if(istype(orbit) && orbit.orbiting != target)
-		to_chat(src, "<span class='notice'>Now following \the [target].</span>")
+	glide_before_follow = src.glide_size
+	src.glide_size = target.glide_size
 
 	forceMove(target)
 	orbit(target, orbitsize, FALSE, 20, 36)
 
+	if(orbiting)
+		to_chat(src, SPAN_NOTICE("Now following \the [target]."))
+
 /mob/dead/observer/orbit()
 	set_dir(WEST) // Reset dir so the right directional sprites show up
 	..()
 
 /mob/observer/ghost/proc/stop_following()
 	if(orbiting)
+		to_chat(src, SPAN_NOTICE("No longer following \the [orbiting.orbiting]."))
 		stop_orbit()
-		to_chat(src, SPAN_NOTICE("No longer following \the [following]."))
-		unregister_signal(following, SIGNAL_MOVED)
-		unregister_signal(following, SIGNAL_DIR_SET)
-		unregister_signal(following, SIGNAL_QDELETING)
-		following = null
+		glide_size = glide_before_follow
+		glide_before_follow = 0
 
 /mob/observer/ghost/move_to_turf(atom/movable/am, old_loc, new_loc)
 	var/turf/T = get_turf(new_loc)

code/modules/orbit/orbit.dm

@@ -69,7 +69,7 @@
 	return TRUE
 
 /atom/movable
-	var/weakref/orbiting = null
+	var/datum/orbit/orbiting = null
 	var/cached_transform = null
 
 /atom
@@ -104,7 +104,7 @@
 
 /atom/movable/proc/stop_orbit()
 	SpinAnimation(0, 0)
-	qdel(orbiting)
+	QDEL_NULL(orbiting)
 	transform = cached_transform
 
 /atom/Destroy()