Tory.berra/fix/invalid group clause

DataTables-Editor-Server/Field.cs

@@ -739,7 +739,7 @@ public Field Xss(Boolean flag)
         /// Called by the Editor / Join class instances - not expected for general
         /// consumption - internal.
         /// </summary>
-        /// <param name="action">Direction that the data is travelling  - 'get' is reading DB data, `create` and `edit` for writing to the DB</param>
+        /// <param name="action">Direction that the data is traveling  - 'get' is reading DB data, `create` and `edit` for writing to the DB</param>
         /// <param name="data">Data submitted from the client-side when setting.</param>
         /// <returns>true if the field should be used in the get / set.</returns>
         internal bool Apply(string action, Dictionary<string, object> data = null)

DataTables-Editor-Server/SearchBuilderOptions.cs

@@ -245,11 +245,11 @@ internal List<Dictionary<string, object>> Exec(Field fieldIn, Editor editor, Lis
                 .Table(this._table)
                 .LeftJoin(_leftJoin);
 
-            if(fieldIn.Apply("get") && fieldIn.GetValue() == null){
+            if(fieldIn.Apply("get") && fieldIn.GetValue() == null) {
                 query
                     .Get(this._value + " as value")
                     .Get(_label + " as label")
-                    .GroupBy(this._value);
+                    .GroupBy(this._value + ", " + _label);
             }
 
             var res = query.Exec()

DataTables-Editor-Server/SearchPaneOptions.cs

@@ -277,7 +277,7 @@ internal List<Dictionary<string, object>> Exec(Field fieldIn, Editor editor, Lis
                 .Table(table)
                 .Get(label + " as label")
                 .Get(value + " as value")
-                .GroupBy(value)
+                .GroupBy(value + ", " + label)
                 .Where(_where)
                 .LeftJoin(join);