Merge pull request #5937 from topcoder-platform/features/mm-dashboard

fix loading indicator

Author: ThomasKranitsas

src/shared/containers/challenge-detail/index.jsx

@@ -675,7 +675,7 @@ ChallengeDetailPageContainer.defaultProps = {
   isLoadingSubmissionInformation: false,
   submissionInformation: null,
   // prizeMode: 'money-usd',
-  statisticsData: [],
+  statisticsData: null,
 };
 
 ChallengeDetailPageContainer.propTypes = {