function clear( ctx, force )
{
	if ( force || ctx._select.style === 'single' ) {
		var api = new DataTable.Api( ctx );

		api.rows( { selected: true } ).deselect();
		api.columns( { selected: true } ).deselect();
		api.cells( { selected: true } ).deselect();
	}
}
Clear all selected items

@param  {DataTable.settings} ctx Settings object of the host DataTable
@param  {boolean} [force=false] Force the de-selection to happen, regardless
    of selection style
@private