pgAdmin III commit: Only enable the Enable/Disable Trigger options if t

Only enable the Enable/Disable Trigger options if triggers actually
exist on the selected table. Also, fix a problem with constraint
trigger identification while we're at it.

Branch
------
master

Details
-------
http://git.postgresql.org/gitweb?p=pgadmin3.git;a=commitdiff;h=d5572bb6e29e06242632c24fe6847e0b50533cac

Modified Files
--------------
pgadmin/include/schema/pgTable.h |   10 +++++++++-
pgadmin/schema/pgDatabase.cpp    |    5 +++--
pgadmin/schema/pgTable.cpp       |   23 ++++++++++++++++++++---
pgadmin/schema/pgTrigger.cpp     |    6 +++++-
4 files changed, 37 insertions(+), 7 deletions(-)