Shortcut to clear filter

Simple feature request:

I'd love to have a shortcut that allows me to clear the filter, doing exactly what the button "Clear Filter" does at the moment.

Not sure what follows the logic of the current shortcuts best, but maybe **⌥⌘C** ?

🎉😊

Start by locating the existing “Clear Filter” button action and the handling for current keyboard shortcuts. Add a shortcut that invokes the same clear-filter behavior, then verify that it matches the button and does not conflict with existing shortcuts.

Written by the indexing model from the issue text.