Spencer Ahrens eeddef18b8 Use separators API in UIExplorer list
Summary: Clean up code and polish UI.

Reviewed By: yungsters

Differential Revision: D4872739

fbshipit-source-id: e7977c94e744cef30fad2832cf41d7a7b5ec2b2e
2017-04-12 17:01:03 -07:00
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