pgAdmin III commit: Make sure the DEL key is usable in the frmEditGrid

Make sure the DEL key is usable in the frmEditGrid

DEL key was sometime disabled when the Delete menu item was disabled (meaning,
each time the user didn't select a complete row). Text deletion wasn't working
as usual (no delete of the selected text, etc.). This patch fixes all these
issues.

Report from Lutischan Ferenc.

Branch
------
REL-1_12_0_PATCHES

Details
-------
http://git.postgresql.org/gitweb?p=pgadmin3.git;a=commitdiff;h=c102f4e600e0c8eb776744172bc2a3ed54be96e1

Modified Files
--------------
pgadmin/frm/frmEditGrid.cpp |   22 ++++++++++------------
1 files changed, 10 insertions(+), 12 deletions(-)