Next patch for 8.5 support: WHEN clause in CREATE TRIGGER

Hi,

Here is a patch to add the support for this new 8.5 functionality. Ticket is
http://code.pgadmin.org/trac/ticket/99, commitfest item is
https://commitfest.postgresql.org/action/patch_view?id=198.

I don't really like the way I get the old WHEN clause, but I don't find
another way. Another thing that bothers me is the text field: it's one line
only. Perhaps a bit small?

Comments?


--
Guillaume.
 http://www.postgresqlfr.org
 http://dalibo.com