Uncaught TypeError: Cannot read property 'offsetParent' of undefined when draggableColumns is enabled

## Expected Behavior

Draggable columns can work properly

## Current Behavior

Get error `Uncaught TypeError: Cannot read property 'offsetParent' of undefined`

## Steps to Reproduce (for bugs)

1. Open [https://dashboard-preview.web.app/timah](https://dashboard-preview.web.app/timah), please wait until all charts and tables has been loaded.
2. Click inspect element, then open console tab.
3. Select table you want to drag its column, e.g. Tender Amount by Vendor.
4. Drag one column inside that table.
5. When that column is dragging, check the console that displays `Uncaught TypeError: Cannot read property 'offsetParent' of undefined`.

## Your Environment

| Tech | Version |
|--------------|---------|
| `@material-ui/core` | 4.10.2 |
| `mui-datatables` | 3.1.0 |
| `react` | 16.13.1 |
| browser | Google Chrome on Linux (Ubuntu 20.04) |

Start with the linked dashboard-preview.web.app reproduction and follow the draggableColumns behavior in mui-datatables under React 16.13.1, @material-ui/core 4.10.2, and Chrome on Ubuntu. Drag a column in the Tender Amount by Vendor table and inspect the console; done means columns can be dragged without the offsetParent TypeError.

Written by the indexing model from the issue text.