Hotkey for Show All (or modify Show Only to toggle between states)

[sethcshort]

I love the hotkey for "Show Only" (ALT-LMB). I'd love to see hotkeys for Show All and Hide.

Or, maybe even better, change the Show Only hotkey so it toggles between the three states -- Show Only, Hide, Show All -- each click changing the state in order. Although that might be undesirable if there are a LOT of models in the scene, as changing visibility willy-nilly back and forth would be a slow process, and might justify just using the right-click menu instead.

Thanks!
Seth