Replace all modular HTML spans with defines spans

In total:
- Adds span defines for `reallybig hypnophrase`, `big warning`, `header`
- Fixes a missing apostrophe for hypno stare
- Makes a special exception for cuddling.dm, which uses an irregular span
- Puts the spans file back

modular_splurt/code/modules/admin/centcom_communications.dm

@@ -35,7 +35,7 @@ GLOBAL_VAR_INIT(next_command_message_id, 1)
 		if ("orbit_sender")
 			var/atom/movable/sender = get_mob_by_key(params["sender_ckey"])
 			if(!sender)
-				to_chat(usr, "<span class='notice'>This player cannot be observed.</span>")
+				to_chat(usr, span_notice("This player cannot be observed."))
 				return
 
 			if(!isobserver(admin.mob))