[fixed] check if element exists before focusing in scopeTab helper
[fixed] check if element exists before focusing in scopeTab helper

rackt/react-modal,reactjs/react-modal,springload/react-modal,springload/react-modal,diasbruno/react-modal,bluSCALE4/react-modal,bluSCALE4/react-modal,springload/react-modal,bluSCALE4/react-modal,diasbruno/react-modal,reactjs/react-modal,rackt/react-modal,reactjs/react-modal,diasbruno/react-modal