fix(authentication) fixed close on cancel click

react/features/authentication/components/web/LoginDialog.js

      */
     _onCancelLogin() {
         const { dispatch } = this.props;
-        const cancelButton = document.getElementById('modal-dialog-cancel-button');
 
-        if (cancelButton) {
-            cancelButton.onclick = () => {
-                dispatch(cancelLogin());
-            };
-        }
-
-        return false;
+        dispatch(cancelLogin());
     }
 
     _onLogin: () => void;
 
         return (
             <Dialog
+                disableBlanketClickDismiss = { true }
                 hideCloseIconButton = { true }
                 okDisabled = {
                     connecting

react/features/authentication/components/web/WaitForOwnerDialog.js

      */
     _onCancelWaitForOwner() {
         const { dispatch } = this.props;
-        const cancelButton = document.getElementById('modal-dialog-cancel-button');
 
-        if (cancelButton) {
-            cancelButton.onclick = () => {
-                dispatch(cancelWaitForOwner());
-            };
-        }
-
-        return false;
+        dispatch(cancelWaitForOwner());
     }
 
     _onIAmHost: () => void;
 
         return (
             <Dialog
+                disableBlanketClickDismiss = { true }
                 hideCloseIconButton = { true }
                 okKey = { t('dialog.IamHost') }
                 onCancel = { this._onCancelWaitForOwner }