[SQL Lab] Avoid closing save query modal on backdrop click (#7111)

Closes #7110

superset/assets/src/SqlLab/components/SaveQuery.jsx

@@ -146,6 +146,7 @@ class SaveQuery extends React.PureComponent {
           ref={(ref) => { this.saveModal = ref; }}
           modalTitle={t('Save Query')}
           modalBody={this.renderModalBody()}
+          backdrop="static"
           triggerNode={
             <Button bsSize="small" className="toggleSave" onClick={this.toggleSave}>
               <i className="fa fa-save" /> {t('Save Query')}

superset/assets/src/components/ModalTrigger.jsx

@@ -36,6 +36,7 @@ const propTypes = {
   bsSize: PropTypes.string,
   className: PropTypes.string,
   tooltip: PropTypes.string,
+  backdrop: PropTypes.oneOf(['static', true, false]),
 };
 
 const defaultProps = {
@@ -77,6 +78,7 @@ export default class ModalTrigger extends React.Component {
         onExit={this.props.onExit}
         bsSize={this.props.bsSize}
         className={this.props.className}
+        backdrop={this.props.backdrop}
       >
         {this.props.modalTitle &&
           <Modal.Header closeButton>