Recovery of commit selection doesn't work if the user hasn't explicitly selected a branch

[JR-Morgan]

If the user hasn't explicitly set a branch, and instead they let it default to main,
then the branch/commit recovery does not work.

Case 1: working as expected

1. Select a branch from the drop down (any branch, even the already selected "main", but you must select one explicitly)
2. Select a commit that isn't the latest one
3. Refresh stream
4. Observe, selection has persisted as expected

Case 2: not working as expected, branch & commit selection reset to main+latest

1. Select a commit that isn't the latest one
2. Refresh stream
3. Observe, selection has been changed to latest commit

[JR-Morgan]

@overengineer any chance you're interested in taking a look at this issue?

If not, no worries, I'm happy to take a look.
Ideally we'd fix this before making the 2.20 release so this one is higher priority than #205 or #200

[overengineer]

I fixed this bug with 1993180

[JR-Morgan]

@overengineer amazing thank you, do you mind making a PR

[overengineer]

#206