VSA settings: Improve edit value stream settings page flow

Proposal

As a follow-up to this discussion, upon successfully editing a value stream in the settings page:

• The user should be redirected back to the value stream's page
• The user should be presented with a success alert using the visitUrlWithAlerts util.

This flow would mirror the one currently used when creating a new value stream in its respective settings page:

Screen Recording 2024-08-05 at 5.08.45 PM.mov

Original proposal

As a follow-up to this discussion:

The only thing I wanted to point out is that the saving state on the Edit page is a little jarring. The old experience used to close the modal on save, but now the entire page disappears for a second with a loading spinner.

Let's improve the loading state on the Edit Value Stream settings page so that, upon form submission, the page is not briefly replaced with a loading spinner while the updated value stream is fetched.

Screen_Recording_2024-03-22_at_2.16.25_PM