QuickView: don't walk into child branches when navigating to more recent commits #2766

Description

When navigating forward (to more recent commits) in QuickView, the descendant walker follows all children of the current commit. If a commit has multiple children (e.g., someone branched off from it), navigation walks into those child branches instead of staying on the current branch.

Expected behavior

When navigating forward, only follow the child that is a continuation of the current branch — i.e., the child whose first parent is the current commit. Children whose first parent is a different commit (meaning they were started as a new branch from here) should be skipped.

I can propose a PR if you are willing to add the feature. Would it be the default behavior or should it be configurable?