Ui-table date sort

A quick jump start .... This should handle your Sting - depending moment.js defined input / output format

{
    "tabulator": {
        "columns": [
            {
                "title": "Time",
                "field": "timestamp",
                "width": 100,
                "formatter": "datetime",
                "formatterParams": {
                    "inputFormat": "YYYY-MM-DD HH:mm:ss.SSS",
                    "outputFormat": "HH:mm:ss",
                    "invalidPlaceholder": "(invalid time)"
                }
            }
        ]
   }
}