[Feature request] Fillable but not editable columns

My use case is a dropdown column where the user can immediately click on a column to select an option while also seeing drag to fill control, I am achieving this by using `onRowChange` of the`formatter` component.

But according to this line, https://github.com/adazzle/react-data-grid/blob/main/src/DragHandle.tsx#L92-L98 the drag-to-fill control do nothing if the editor is not specified (another question why render it at all if it is doing nothing)?

So I need to do something like this to make it work, while it still hides the fill control on double click into the field:

```tsx
editor: function DropdownColumnFormatter({ row, onClose, onRowChange }) {
return (
{
console.log(row)
onRowChange(row, true);
onClose()
}}
/>
);
},
editorOptions: {
renderFormatter: true,
},
formatter: function DropdownColumnFormatter({ row, onRowChange }) {
return (

);
},
```

I would expect to not specify these props at all or just `editable: true` and still having an ability to change the row by filling without rendering editor