I have a component that I want to have custom functionality
when the user hits the tab key. I want to basically override the
focusManager's default behaviour and instead of tabbing out of the
component, I want to do my own thing.
I know if I have sub-components, they can have a tab cycle,
but I just want to retain the focus without needing sub-components.
If I have a focusOutHandler then I can do setFocus and have
it immediately focus back, but that only works if tabbing doesn't
cause the next focus to be outside of the flash player.