Changes:

1. The default expand/collapse behavior in trees has changed to become more consistent among all trees in the workbench: one must now click the twistie/icon of the tree node to expand/collapse it. Double clicking also works. You can revert this with the workbench.tree.expandMode setting.
2. The default style of a focused list/tree element has changed to the default focused widget outline color This was adopted across all core themes. We will suggest theme authors to do the same.

👉 Tip: If you want to restore old behavior, simply toggle the workbench.tree.expandMode setting.