Default overlay leave transition does not fade content nicely

Environment

• Package version(s): 3.49.1

Code Sandbox

Link to a minimal repro https://codesandbox.io/s/blueprint-overlay-ktx4f?file=/src/index.tsx

Steps to reproduce

1. Open overlay with button
2. click outside overlay to close it
3. the backdrop fades but the card hangs for a second and then disappears in a very clunky transition

Expected behavior

The default transition should match the fade of the backdrop so that it looks nice. The docs use a custom transition. It would be nice to cleanup the default transition and use that instead.

Possible solution