More globals (#19247)

* More globals

* planets

* .

* .

* Update jukebox.dm

* Fix timer callback syntax in jukebox.dm

* .

code/modules/modular_computers/NTNet/NTNRC/conversation.dm

@@ -1,4 +1,4 @@
-var/global/ntnrc_uid = 0
+GLOBAL_VAR_INIT(ntnrc_uid, 0)
 
 /datum/ntnet_conversation/
 	var/id = null
@@ -9,8 +9,8 @@ var/global/ntnrc_uid = 0
 	var/password
 
 /datum/ntnet_conversation/New()
-	id = ntnrc_uid
-	ntnrc_uid++
+	id = GLOB.ntnrc_uid
+	GLOB.ntnrc_uid++
 	if(GLOB.ntnet_global)
 		GLOB.ntnet_global.chat_channels.Add(src)
 	..()