Side navigation is not functioning as expected in the v14 release branch

[brentswisher]

Expected behavior
The sidenav component is visible when it is expected to be.

Actual behavior
When viewing storybook on the v14 branch, the sidenav component is not displaying when it should be. It was also flagged by chromatic in a couple of builds: https://60919c26122bd50039b34644-xcjezwbxfi.chromatic.com/?path=/story/components-layout--one-column-with-sidenav&globals=viewport.width:1056

Steps to reproduce the issue

1. Run storybook on the v14 branch
2. Look at the stories which contain a sidenav component:
   1. Layouts > "with sidenav" stories
   2. Pages > Reports
3. See that the sidenav is not displaying like it used to

Screenshots or code

Pharos version
v14 release branch

Your environment

• OS: macOS
• Browser: Chrome
• Version: 120.0.6099.216

Additional information
This seems to have happened around the time of #478. The components are mounted but are not being set to be visible.

[daneah]

Does this seem different than #653?

[brentswisher]

I think so, as that is focused on the Pharos site and this is related to the storybook stories? @satya-achanta-venkata also took a look at that during our working session and thought it was already working as expected from what he could see.