fix BB license check bug; clean up license commands

src/ServerState.cc

@@ -383,7 +383,8 @@ void ServerState::create_menus(shared_ptr<const JSONObject> config_json) {
   this->main_menu.emplace_back(MainMenuItemID::DISCONNECT, u"Disconnect",
       u"Disconnect", 0);
   this->main_menu.emplace_back(MainMenuItemID::CLEAR_LICENSE, u"Clear license",
-      u"Disconnect with an\ninvalid license error\nso you can enter a\ndifferent serial\nnumber, access key,\nor password", 0);
+      u"Disconnect with an\ninvalid license error\nso you can enter a\ndifferent serial\nnumber, access key,\nor password",
+      MenuItem::Flag::INVISIBLE_ON_BB);
 
   try {
     this->welcome_message = decode_sjis(d.at("WelcomeMessage")->as_string());