Thanks. Would this be correct implementation?
{ title: 'test', filter: { crules: [{ condition: 'range' }],
selectGridCreated: function(ui){
var c = ui.grid.Checkbox(ui.column.dataIndx);
if( c.isHeadChecked() )
c.unCheckAll();
} } }
When opening the dropdown the grid seems to refetch data from db?