optimize code (#5605)

frontend/src/components/dialog/share-to-group.js

@@ -45,6 +45,7 @@ class GroupItem extends React.Component {
           <SharePermissionEditor
             repoID={this.props.repoID}
             isTextMode={true}
+            autoFocus={true}
             isEditIconShow={this.state.isOperationShow}
             currentPermission={currentPermission}
             permissions={this.props.permissions}