How to prevent re-render after click on custom column buttons

Hello,

This is an awesome package that have been very helpful for me and a true time saver (so thanks ! ) but I have an issue with the table re-rendering on click on buttons.

I have a column with customBodyRender containing a button for downloading a file. On click on this button the state value "isLoading" is set to true in order to display a loading spinner.
The table data is not at all updated so there is no need to re-render the table and lose all filters or sorting.

Is there an option to prevent the re-rendering ? or any workaround ?

## Expected Behavior

The table should not re-render if the data is not changed.
## Current Behavior

The table re-render on click on a button that does not update the table data.
## Steps to Reproduce (for bugs)

1. create a custom column with button having onclick function that updates a state other than the table data.
2. select a filter or sort a column
3. click on the button
4. table is re-rendered having lost all filters, sorting (and probably pagination).

## Your Environment

| Tech | Version |
|--------------|---------|
| Material-UI | 4.0.0 |
| MUI-datatables | 2.7.0 |
| React | 16.8.6 |
| browser | Chrome, IE |