Flaky playwright test: `spaces/spaces.spec.ts: should disallow creating public rooms`

[RiotRobot]

https://github.com/element-hq/element-web/actions/runs/18780579383

[Half-Shot]

Looks to be related to spaces.spec.ts openSpaceCreateMenu being flaky. Sometimes the space create window won't open, I suspect it might be due to the container panel rerendering?

[RiotRobot]

https://github.com/element-hq/element-web/actions/runs/18932101387

[RiotRobot]

https://github.com/element-hq/element-web/actions/runs/18964816494

[RiotRobot]

https://github.com/element-hq/element-web/actions/runs/19036647308