tgui: Secrets Panel (#55698)

Tgui-izes the secrets panel

Removes one terrible shuttle button, but just know all of them are pretty shit
There can only be one (40 second delay) was condensed into an option for there can only be one

Before it was a blank HTML document. It has some kind of useful stuff, and also some shitpost-y stuff. Using some tab system really helps you pick out where the logging/issue fixing buttons are and where the silly garbage

code/modules/admin/admin_verbs.dm

@@ -415,13 +415,6 @@ GLOBAL_PROTECT(admin_verbs_hideable)
 		holder.Game()
 	SSblackbox.record_feedback("tally", "admin_verb", 1, "Game Panel") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
 
-/client/proc/secrets()
-	set name = "Secrets"
-	set category = "Admin.Game"
-	if (holder)
-		holder.Secrets()
-	SSblackbox.record_feedback("tally", "admin_verb", 1, "Secrets Panel") //If you are copy-pasting this, ensure the 2nd parameter is unique to the new proc!
-
 /client/proc/poll_panel()
 	set name = "Server Poll Management"
 	set category = "Admin"

code/modules/admin/topic.dm

@@ -1691,9 +1691,6 @@
 					break
 		return
 
-	else if(href_list["secrets"])
-		Secrets_topic(href_list["secrets"],href_list)
-
 	else if(href_list["ac_view_wanted"])            //Admin newscaster Topic() stuff be here
 		if(!check_rights(R_ADMIN))
 			return

code/modules/admin/verbs/onlyone.dm

@@ -5,6 +5,7 @@ GLOBAL_VAR_INIT(highlander, FALSE)
 		return
 	GLOB.highlander = TRUE
 
+	sound_to_playing_players('sound/misc/highlander.ogg')
 	send_to_playing_players("<span class='boldannounce'><font size=6>THERE CAN BE ONLY ONE</font></span>")
 
 	for(var/obj/item/disk/nuclear/N in GLOB.poi_list)
@@ -41,7 +42,7 @@ GLOBAL_VAR_INIT(highlander, FALSE)
 	send_to_playing_players("<span class='userdanger'>Bagpipes begin to blare. You feel Scottish pride coming over you.</span>")
 	message_admins("<span class='adminnotice'>[key_name_admin(usr)] used (delayed) THERE CAN BE ONLY ONE!</span>")
 	log_admin("[key_name(usr)] used delayed THERE CAN BE ONLY ONE.")
-	addtimer(CALLBACK(src, .proc/only_one), 420)
+	addtimer(CALLBACK(src, .proc/only_one), 42 SECONDS)
 
 /mob/living/carbon/human/proc/make_scottish()
 	mind.add_antag_datum(/datum/antagonist/highlander)