[cvs-nhc98] Refactor hat-explore: introduce more options in the state

malcolm: Tue Feb 26 11:59:24 CET 2002 Update of /usr/src/master/nhc/src/hat/tools In directory hinken:/tmp/cvs-serv15635 Modified Files: HatExplore.hs LowLevel.hs Log Message: Refactor hat-explore: introduce more options in the state, and refine the Cmd type with separate Cursor movement commands and Toggle options.