This is a helper addon for the Tree Style Tab 3.4.0 and later.
If you are suffered from too frequently expansion of trees, you can lock them as collapsed with this helper addon. You only need to double-click on a parent tab, then TST won't expand the tab on various actions.
This was a built-in feature of TST 3.3.0-3.3.6 but separated to a helper addon.
