WinHugs, fix up menu help messages

[Ross Paterson]

On Wed, Sep 07, 2005 at 05:52:28PM +0100, Neil Mitchell wrote:
> This puts sensible descriptions for each menu item. Where the menu
> item has gone, the description is removed. Where new menu items are
> created, they have the appropriate description.

I'd like to attach the User's Guide to Help/Contents, though we could also
offer the old User Manual (hugs98.chm) lower down the menu as a backup.
HELPCOMMANDS should probably be "Summary of Hugs Commands".

Links to the Haskell 98 Report and the Hierarchical Libraries (at
http://www.haskell.org/ghc/docs/6.4-latest/html/libraries/index.html)
might also be useful.