Add "not empty" or "has a value" report filter

When using the filters with reports and pivots, it would be helpful to filter all features 'with a tag', or 'not empty'. We use the tags feature to indicate features for given customers. This works great, and enables to have a transversal view of all requirements or improvements made for a given customer whatever the product. However, I wanted to include this view in a notebook (show features/products per tag); but the only way to exclude features without any tag from the pivot view was to select all tags. This is not really a problem, but I have to be sure to update the filter regularly in the saved view to include newly created tags. Having a "not empty" option would always ensure that new tags are included in the report.