two list for select/option format:
list of map:
{int_displayValue: lable_for_click_selection}
or
{string_displayValue: lable_for_click_selection}
input value > 2012-01-08' is acceped
input string length must smaller than 4 char
turn on commitOption on autoCommitOnBlur
grid.GridOptions opt = new grid.GridOptions()
..autoCommitOnBlur = true;
sg.onActiveCellBlur.subscribe((e, args) {
print(args['old']);
print(args['new']);
sg.commitCurrentEdit();
});