SSR jank #4894

Closes #4894

SSR isn't working very well on my local, but from what I can tell, this is working to get rid of the jump when loading various pages.

Example load: https://streamable.com/7oo6bc

Testing

1. Open Chrome with dev tools.
2. Go to the performance tab - make sure "Screenshots" is checked in the topbar.
3. Set a throttled network speed (so that client-side scripts take longer to download).
4. Hit record.
5. Load [pages that this has been applied for (search MR for modules with preventLayoutReset: true)
6. Step through screenshots to see loading jank.
7. Contrast with production.