Fix show button not showing back up when leaving

assets/core/networking/scripts/lobby.gd

@@ -109,6 +109,7 @@ func reset_ui():
 	start_button.disabled = true
 	user_list_box.visible = false
 	lobby_list_box.visible = false
+	show_lobbies_button.disabled = false
 	added_users.clear()
 	for child in user_list_box.get_children():
 		child.queue_free()