TGS chat usage cleanup

- Rename send2tgs to sent2adminchat.
- Move both chat procs to SSdiscord.dm.
- Fix bug when sending to TGS4 non-admin chats.
- Add DMdocs
- Improve notify command
  - Store mentions as strings
  - Disable command if config setting isn't enabled

code/modules/admin/verbs/adminhelp.dm

@@ -214,7 +214,7 @@ GLOBAL_DATUM_INIT(ahelp_tickets, /datum/admin_help_tickets, new)
 /datum/admin_help/proc/AddInteraction(formatted_message)
 	if(heard_by_no_admins && usr && usr.ckey != initiator_ckey)
 		heard_by_no_admins = FALSE
-		send2tgs(initiator_ckey, "Ticket #[id]: Answered by [key_name(usr)]")
+		send2adminchat(initiator_ckey, "Ticket #[id]: Answered by [key_name(usr)]")
 	_interactions += "[time_stamp()]: [formatted_message]"
 
 //Removes the ahelp verb and returns it after 2 minutes
@@ -576,15 +576,9 @@ GLOBAL_DATUM_INIT(ahelp_tickets, /datum/admin_help_tickets, new)
 			final = "[msg] - No admins online"
 		else
 			final = "[msg] - All admins stealthed\[[english_list(stealthmins)]\], AFK\[[english_list(afkmins)]\], or lacks +BAN\[[english_list(powerlessmins)]\]! Total: [allmins.len] "
-		send2tgs(source,final)
+		send2adminchat(source,final)
 		send2otherserver(source,final)
 
-
-/proc/send2tgs(msg,msg2)
-	msg = replacetext(replacetext(msg, "\proper", ""), "\improper", "")
-	msg2 = replacetext(replacetext(msg2, "\proper", ""), "\improper", "")
-	world.TgsTargetedChatBroadcast("[msg] | [msg2]", TRUE)
-
 //
 /proc/send2otherserver(source,msg,type = "Ahelp",target_servers)
 	var/comms_key = CONFIG_GET(string/comms_key)

code/modules/admin/verbs/adminpm.dm

@@ -147,7 +147,7 @@
 		to_chat(src, "<span class='notice'>PM to-<b>Admins</b>: <span class='linkify'>[rawmsg]</span></span>", confidential = TRUE)
 		var/datum/admin_help/AH = admin_ticket_log(src, "<font color='red'>Reply PM from-<b>[key_name(src, TRUE, TRUE)]</b> to <i>External</i>: [keywordparsedmsg]</font>")
 		externalreplyamount--
-		send2tgs("[AH ? "#[AH.id] " : ""]Reply: [ckey]", rawmsg)
+		send2adminchat("[AH ? "#[AH.id] " : ""]Reply: [ckey]", rawmsg)
 	else
 		if(recipient.holder)
 			if(holder)	//both are admins