make iframe sandbox and allow attribute to constant variables for easier updates (#433)
make iframe sandbox and allow attribute to constant variables for easier updates (#433)


u9520107/ringcentral-js-widget,ringcentral/ringcentral-js-widget,ringcentral/ringcentral-js-widget,u9520107/ringcentral-js-widget,u9520107/ringcentral-js-widget,ringcentral/ringcentral-js-widget