[UI] Tag filter selection not saved in session for UI when navigating between left-side menu items

[robfreedy]

Bug summary

In Prefect Cloud, the tag selection is not saved in session when navigating back and forth between left-side navigation tabs.

Steps to reproduce:

1. Select a tag filter on the "Flows" page

2. Navigate to another left side menu item (i.e. "Runs", for example)

3. Navigate back to the "Flows" page where the tag filter has been cleared

One thing to note is that these tag filter selections are saved on page refresh.

Version info

N/A

Additional context

Recreated in Prefect Cloud (not tested in Prefect server)