pga3: Help file locations

I'm having serious trouble getting the helpfiles to be found in pgAdmin
III as the code used to find pages seems to be different for virtually
every help menu option.

I have started sorting this out by moving bugreport.html into the main
doc directory. I haven't modified the code to display it, but have added
it to the index page.

Currently, the Help menu contains these options:

Help...
pgAdmin III FAQ
SQL Help
PostgreSQL Help
Tip of the Day...
-------
Bugreport
About...

I think we should have:

pgAdmin Help    (docs/en_US/index.html)
SQL Help        (docs/en_US/pg/sql-commands.html | xxx.html)
PostgreSQL Help   (docs/en_US/pg/index.html)
pgAdmin FAQ       (http://www.pgadmin.org/pgadmin3/faq/)
Tip of the Day
-------
Bug Reporting     (docs/en_US/pg/bugreport.html)
About

Now, on Windows, the docs are in $INSTALLDIR/docs/en_US/ and
$INSTALLDIR/docs/en_US/. The binaries live in $INSTALLDIR.

On Unix, the docs are (normally) in
$INSTALLDIR/share/pgadmin3/docs/en_US/ and
$INSTALLDIR/share/pgadmin3/docs/en_US/pg/. The binaries live in
$INSTALLDIR/bin/

I'm pretty tired right now, so am not going to try to figure out how to
tidy all this up at the moment, but will think it over. Any other
thoughts or suggestions would be very useful.

Regards, Dave.