Lemurian Sea (#22686)

changes:
  - refactor: "Refactors Gravity Generator UI from HTML to TGUI."
- rscadd: "Adds sector-based modifier var 'overmap_hazards_multiplier'
for generating total overmap hazard count."
  - soundadd: "Adds new Lemurian Sea 'welcome' announcements."
- rscadd: "Added Lemurian Sea gravitic anomalies as overmap hazards and
random events."
  - rscadd: "Adds ADPI/The Voices."
- rscadd: "Adds ADPI Panel for modmins to send ADPI messages to a single
character or all characters from their respective pools, or custom
messages."
- balance: "Vaurca Hivenet communication, the Hivenet Manifest, and
Hivenet Echoes are now disabled while the ship is in Lemurian Sea
sectors."

code/modules/mining/mine_items.dm

@@ -1430,7 +1430,6 @@ GLOBAL_LIST_INIT_TYPED(total_extraction_beacons, /obj/structure/extraction_point
 		target = get_atom_on_turf(src)
 	if(!target)
 		target = src
-	QDEL_NULL(effect_overlay)
 	if(location)
 		new /obj/effect/overlay/temp/explosion(location)
 		playsound(location, 'sound/effects/Explosion1.ogg', 100, 1)