SMART datagrid v.1 > Classes > FilterSelectorOptions
The maximum width of filter selection box. 
It is specified as a relative value (percent) about pixel fixed value or grid height.
Defaults to undefined.
    grid.setOptions({
        operate: {
            filterSelector: {
                maxWidth: "90%",
                minWidth: "70%"
            }
        },
        ...
    });
    grid.setOperateOption({
        filterSelector: {
            maxWidth: "90%",
            minWidth: "70%"
        }
    });
    grid.operateOptions().filterSelector().setMaxWidth("90%");