Maybe fix winset crashing Logout? (#17662)

code/modules/mob/new_player/logout.dm

@@ -2,10 +2,7 @@
 	ready = 0
 
 	QDEL_NULL(lobby_window)
-
-	var/client/exiting_client = GLOB.directory[persistent_ckey]
-	if(exiting_client)
-		winset(exiting_client, "lobby_browser", "is-disabled=true;is-visible=false")
+	disable_lobby_browser()
 
 	..()
 
@@ -16,3 +13,8 @@
 		key = null//We null their key before deleting the mob, so they are properly kicked out.
 		qdel(src)
 	return
+
+/mob/new_player/proc/disable_lobby_browser()
+	var/client/exiting_client = GLOB.directory[persistent_ckey]
+	if(exiting_client)
+		winset(exiting_client, "lobby_browser", "is-disabled=true;is-visible=false")