Return back to read-only view after successfully making edits

The following discussion from !78396 (merged) should be addressed:

• @gdoyle started a discussion: (+1 comment)

  Making edits and returning back to read-only

  When I edit a runner, I am not sent back to the read-only view, which is confusing because that's what I'd expect when I save changes. This would also mean that we'd have to include a toast OR success alert that changes were saved.

  Here's the current experience:

  RunnerEditReadOnly

Proposal

After saving edits for a runner, we should return the user back to the read-only view of the runner, and present the current alert that changes were saved on the read-only view instead