Filter out empty strings after splitting top-level JSON

Summary: https://fb.workplace.com/groups/flippersupport/permalink/1169477680199555/

Reviewed By: jknoxville

Differential Revision: D29637437

fbshipit-source-id: cd8c55141f2d95afeea0f8680dd3a0d29943c200

desktop/plugins/public/network/RequestDetails.tsx

@@ -610,6 +610,7 @@ class GraphQLFormatter {
         const parsedResponses = body
           .replace(/}{/g, '}\r\n{')
           .split('\n')
+          .filter((json) => json.length > 0)
           .map((json) => JSON.parse(json));
         return (
           <div>