Hide multiple regions in the region list at once?

I need to hide hundreds of redundant regions in the region list sidebar. In ardour 2.x, this was as easy as shift-selecting the items > right-click > hide.

In Ardour 3.x, right-clicking on items in the region list deselects all items except one. This is frustrating, as it seems the only way to hide multiple items is to right-click on every single one.

How do move all this junk to the “hidden” section? I don’t want to remove it.