I develop on WAB 2.25 with JsApi 4.24
If we look upon ESRI example - LayerList widget with actions
we can see that "US Demographies" has at its rightside a "..." menu.
When the "..." is clicked, a several lines menu is opend and we can click on each line to activate the action we choose.
But - the menu is not auto-closed when we activate an action.
How to make it in my code that the actions-menu will be automatically closed upon activating an action?