major rewrite: cols are now hide/show-hide/show, added style calls/hide/show calls to implement. Added help.

advise running on fresh checkout.

remove user param from column show/hide, add missing func decs, add new col calls to support new display state stuff.

remove user param from column hide/show, add a column set state function, add new style display calls.

fix bug in redisplaying column config. window on redraw. remove user param from column hide/show, use new style display calls.