Blacklist functionality

Some API improvements

lib/dt-helpers.js

@@ -28,6 +28,7 @@ async function ajaxListTx(tx, params, queryFun, columns, options) {
         const query = queryFun(tx);
         query.whereIn(columnsNames[parseInt(params.column)], params.values);
         query.select(columnsSelect);
+        query.options({rowsAsArray:true});
 
         const rows = await query;
         const rowsOfArray = rows.map(row => Object.keys(row).map(key => row[key]));