Prop type check repair (#2919)

* repair intent check wraning

* change doublequote to singlequote, add semicolon

* optimized code

* modify type-check wraning

frontend/src/components/common/notification.js

@@ -24,7 +24,7 @@ class Notification extends React.Component {
       this.setState({
         showNotice: false,
         unseenCount: 0
-      })
+      });
     } else {
       this.loadNotices();
       this.setState({showNotice: true});