Subspaces aren't indented

[robintown]

Steps to reproduce

1. Expand the space panel
2. Click the 'expand' arrow next to a top-level space to reveal its subspaces

Outcome

What did you expect?

The subspaces should be indented further than the top-level space

What happened instead?

They have matching indentation

This was probably regressed by matrix-org/matrix-react-sdk#9157

Operating system

NixOS unstable

Browser information

Firefox 102.0.1

URL for webapp

develop.element.io

Application version

Element version: 9c36adc-react-3d0982e9a603-js-8f13df2dd986 Olm version: 3.2.12

Homeserver

Synapse 1.63.1

Will you send logs?

No

[t3chguy]

Regressed by matrix-org/matrix-react-sdk#9157