Whoops! I added a proper description to hopefully help make things a bit clearer, but could you elaborate on what it is your not understanding?
Ah ok, I read your description, when I read keybinding I already had a notion of what keybindings were so I didn't realize you were doing something different here.
To make the ui more intuitive you could have toggles for what actions are active, as well as a throwaway action for when there is nothing bound, like having the keybinding menu popup.
Just a thought.