fox issue in IE9/10 when use IndirectSelect

In IE9/10, when click selectaAll in IndirectSelect, an error occurs
Merge branch 'master' of https://github.com/oria/gridx
fix issue in select test page

when click 'unselect row 5' in test_grid_select.html in IE, an error
occurs.
Fix GroupHeader keyboard support
add ctrl+s for lazy edit
fix test_grid_extendedSelect test page
Merge branch 'master' of https://github.com/oria/gridx
Make GroupHeader compatible with move/Column
Merge branch 'master' into 1.2