improved performance
fix keyboard navigation
disconnect all signals on destroy
shortcuts to activate the first nine items (<Ctrl> 1-9)
select first visible item if nothing selected
fix _is_actor_visible_on_scroll
fix status message
fix deleting items
closing by click outside extension's window
add confirmation dialog on empty history
add history switcher
select first item after reset filter
update metadata.json
update readme
fix readme
redesign ListView
change show/hide dialog animation
fix statusbar
cleanup
cleanup