pgaccess - pgaccess: better text widget bindings, and the UNDO feature

Log Message:
-----------
better text widget bindings, and the UNDO feature !!!

Modified Files:
--------------
pgaccess:
changelog (r1.10 -> r1.11)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgaccess/pgaccess/changelog.diff?r1=1.10&r2=1.11)
pgaccess/lib:
queries.tcl (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgaccess/pgaccess/lib/queries.tcl.diff?r1=1.2&r2=1.3)
scripts.tcl (r1.1.1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgaccess/pgaccess/lib/scripts.tcl.diff?r1=1.1.1.1&r2=1.2)
pgaccess/main:
window.tcl (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgaccess/pgaccess/main/window.tcl.diff?r1=1.2&r2=1.3)