Add the ability to clear all filters with a single shortcut. Tag filters and text in the search-field should be cleared. The focus in the notes list should reset too and position on top of the list. I suggest to use the "del" key for simplicity. The key is used to delete a note in the notes list though. Thus to delete a note in the notes list Ctrl+Delete should be used. This would be consistent with deleting a note in the notes editor too.
