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**Related issue:** Resolves#40317
# Checklist for submitter
If some of the following don't apply, delete the relevant line.
- [x] Changes file added for user-visible changes in `changes/`,
`orbit/changes/` or `ee/fleetd-chrome/changes`.
See [Changes
files](https://github.com/fleetdm/fleet/blob/main/docs/Contributing/guides/committing-changes.md#changes-files)
for more information.
## Testing
- [ ] Added/updated automated tests
With the current router we have in place, we can't really test `<Link>`
elements, so our ability to make useful automated tests is pretty
limited here. I extracted the fleet name sorting code into an exported
function and added some tests for that.
- [X] QA'd all new/changed functionality manually
- [X] verified that when All Fleets is selected in dropdown, navigating
to Controls switches to Workstations
- [X] verified that when another fleet is selected in dropdown,
navigating to Controls maintains that selection
- [X] verified that when a fleet is selected in dropdown, navigating to
the dashboard changes to All Fleets
- [X] verified that when "Unassigned" is present in the fleets dropdown,
it is at the bottom
- [X] verified that when using a permalink to the dashboard with a fleet
selected (e.g. `?fleet_id=1`), the correct fleet shows as selected
