Command to clear highlight filters and close filter windows

[PrincessRTFM]

Either a single dual-purpose command or a separate one, or even both, would be very useful. QoLBar, TPie, and vanilla macros all allow easy button-based interfaces to activate particular filters in either form, but there is at present no way to bind a "clear filter" action. The only way to do so would be to define a filter that you don't ever actually use and use the set-filter command for it twice, to switch to it and then disable it.