Hi,

The `alwaysVisible` option is ignored when we have an external DataSource.

Consider the following code:

```

var dataSource = new kendo.data.DataSource({
   pageSize: 2,
   data: [
       { name: "Jane Doe", age: 30 },
       { name: "John Doe", age: 33 }
   ]
});

$("#grid").kendoGrid({
   columns: [
       { field: "name" },
       { field: "age" }
   ],
});
var grid = $("#grid").data("kendoGrid");

grid.setDataSource(dataSource);

grid.setOptions({
   pageable: {
       alwaysVisible: false
   }
});

```

Here, since the `pageSize=2` and we have `2` records; I don't expect to see not the pagination and other pager options after `alwaysVisible` is set to `false`.
However, I do see them since `alwaysVisible` is completely ignored.

When I move the datasource back inside the `$("#grid").kendoGrid({})` everything works as expected.

Please let me know if this is an bug or I have mistaken in understanding something about the options.

Thanks,

Ajay