fix for extjs 4.2
fix for extjs 4.2

rvwong/netzke-basepack,rvwong/netzke-basepack,skmitty/netzke-basepack,skmitty/netzke-basepack,rvwong/netzke-basepack,skmitty/netzke-basepack,rvwong/netzke-basepack,skmitty/netzke-basepack