Transform propagation ignoring earlier branches

[ickshonpe]

Bevy version

main

What you did

cargo run --example overflow

Looks fine:

Now resize the window horizontally:

What went wrong

The global transforms for the text nodes aren't updated.

Additional Info

Bisected to #18093 Transform Propagation Optimization: Static Subtree Marking

The descendants of the earlier branches are being skipped during transform propagation when there are multiple branches.

[ickshonpe]

@aevyrie