When choosing a tag criteria, we can choose to restricted the proposed tags among a category of tags

All the tags of the chosen category(ies) are saxed, whatever their level.
But some times we want to proposed in the list only the tags of first level of theses categories.

The widget to select tag's categories should be improved. Add a toggle button to activate/deactivate first level only ?

TagSearchCriterionDefinition should saxed all tags or first level tags only according the widget configuration.