Baseline creation and update

1. Inconsistent baseline selection behavior:
When creating a new Working Set, users have the option to add trackers with a specific baseline.
However, when updating an existing Working Set by adding new trackers, the option to select a baseline is not available.
Providing the same baseline selection menu during updates would improve usability; otherwise, users must manually select a baseline for each tracker, which is time‑consuming.

2. Baseline selection is lost when navigating back:
After users select trackers with a specific baseline and move to the next step, a summary of the selections is displayed.
If the user goes back to the previous step, the tool resets all baseline selections to HEAD.
As a result, users must again manually reselect the required baseline for each tracker, causing unnecessary repetition and frustration.