Inventory has wrong types in title after filter change

Note to myself.

The changes I made to the filtering system caused the title text of the inventory window to be bad. When using filters, the window title changes to something like "Inventory - Animations, Gestures, Textures". But the code to come up with that text is out of date, so the types it says aren't actually the types being filtered. That code needs to be updated to the new system.