Modal visible -> open

Summary: The `visible` prop is marked as deprecated in favour of `open`

Reviewed By: passy

Differential Revision: D49226821

fbshipit-source-id: 4a4a7d03a1c8ff860c4e4cd02e19071185a8554e

desktop/flipper-ui-core/src/chrome/PlatformSelectWizard.tsx

@@ -122,7 +122,7 @@ class PlatformSelectWizard extends Component<Props, State> {
 
     return (
       <Modal
-        visible
+        open
         centered
         onCancel={() => {
           this.props.onHide();