3.8.22

* [Now you can search bookmark folder items incrementally by key inputs, on the bookmarks folder chooser UI.](https://github.com/piroor/treestyletab/issues/3077)
* Better auto-sizing of the dialog for confirmation of closing tabs.
* Match appearance of multiselected tabs in the Proton theme to Firefox 99's one (follow to changes introduced at [the bug 1751807](https://bugzilla.mozilla.org/show_bug.cgi?id=1751807)).
* Don't open dialogs as modal, on the debug mode.
* API improvement: Add a new notification message type [`try-collapse-tree-from-other-expansion`](https://github.com/piroor/treestyletab/wiki/API-for-other-addons#suppress-unintentional-collapsion-of-expanded-tree-by-tst) to block collapsion of tabs from expansion of another tree.