Open file import

Summary: This change only adds the PWA as capable of handling files with the ".flipper" extension.

Reviewed By: aigoncharov

Differential Revision: D48353437

fbshipit-source-id: fd78942ac4dffb7d26d5ca5be826290018465b93

desktop/flipper-ui-core/src/sandy-chrome/SandyApp.tsx

@@ -196,5 +196,4 @@ function registerStartupTime(logger: Logger) {
   });
 
   renderHost.sendIpcEvent('getLaunchTime');
-  renderHost.sendIpcEvent('componentDidMount');
 }