Nested originalEvent in DataTable header RowCheckbox event

[NellyHaglund]

I'm submitting a ... (check one with "x")

[x] bug report
[ ] feature request
[ ] support request => Please do not submit support request here, instead see https://forum.primefaces.org/viewforum.php?f=57

DataTable multiple selection onSelectionChange event object differs if triggered from DataTable header row than from DataTable body row.

<DataTable value={this.state.cars} selection={this.state.selectedCars} onSelectionChange={e => console.log(e)}>
  <Column selectionMode="multiple" />
</DataTable

Current behavior

onSelectionChange triggered from DataTable header row:

{
  originalEvent: {
    checked: null,
    data: null,
    originalEvent: {
      altKey: (...)
      bubbles: (...)
      button: (...)
    }
  },
  value: []
}

onSelectionChange triggered from DataTable body row:

{
 originalEvent: {
    altKey: (...)
    bubbles: (...)
    button: (...)
  }
  value: []
}

Expected behavior
The object should be structured the same, without nested originalEvent.

Expected: onSelectionChange triggered from DataTable header row:

{
 originalEvent: {
    altKey: (...)
    bubbles: (...)
    button: (...)
  },
  checked: null,
  data: null,
  value: []
}

• PrimeReact version:
  3.1.7

[mertsincan]

Thanks a lot for the PR!