docs(grid): adjust working with autogenerated columns article closes telerik/telerik.web.ui/issues#1983 (#460)

Author: P1l3T0

controls/grid/columns/working-with-autogenerated-columns.md

@@ -16,6 +16,9 @@ In cases where you want to have a column for each field in the grid datasource a
 
 This article will explain the main specifics of the feature, as well as how you can customize these columns.
 
+>important In order to enable both Grouping and Column Aggregates for the autogenerated columns, set the
+**UseAllDataFields property** of the *MasterTableView* to **true**
+
 ## Auto-generated columns specifics
 
 When you set the AutoGenerateColumns property of RadGrid to true, the RadGrid control generates a separate column for each data field in the control's assigned datasource. Based on the datatype of the field, the control will generate: