Soft crash when enabling new room header labs flag

[t3chguy]

Steps to reproduce

1. Open settings
2. Switch to labs
3. Enable Under active development, new room header & details interface
4. Wait for reload
5. Open a room if you haven't already

Outcome

What did you expect?

Pretty new room header

What happened instead?

Operating system

No response

Browser information

No response

URL for webapp

develop.element.io

Application version

No response

Homeserver

matrix.org

Will you send logs?

No

[germain-gg]

Ping @sandhose @Half-Shot

Notice that version 0.2.2 was build with NODE_ENV=development and crashes react apps when used in production mode.