Submission notice size now updates when the video size changes.

React listeners are properly cleaned up now.

src/render/SkipNotice.tsx

@@ -52,6 +52,8 @@ class SkipNotice {
     }
 
     close() {
+        ReactDOM.unmountComponentAtNode(this.noticeElement);
+
         this.noticeElement.remove();
     }
 }

src/render/SubmissionNotice.tsx

@@ -56,6 +56,8 @@ class SubmissionNotice {
     }
 
     close() {
+        ReactDOM.unmountComponentAtNode(this.noticeElement);
+
         this.noticeElement.remove();
     }
 }