Enable find and refresh on browser windows (#22462)

Regression from BYOND versions <=515 because find/refresh was always
enabled on browser windows even when it wasn't supposed to be.

Enable find (Ctrl+F) and refresh (F5) on browser windows.

code/modules/client/client_procs.dm

@@ -391,6 +391,8 @@ GLOBAL_LIST_INIT(localhost_addresses, list(
 
 	winset(src, "map", "style=\"[MAP_STYLESHEET]\"")
 
+	winset(src, null, list("browser-options" = "+find,refresh"))
+
 	if(IsGuestKey(key) && GLOB.config.external_auth)
 		src.authed = FALSE
 		var/mob/abstract/unauthed/m = new()