Fix ordering of columns whose position was changed using colReorder plugin

[jbtronics]

The colReorder plugin allows changing the position of columns in the datatable. However, this changes the column index, which does not match the backend index anymore. That caused that the wrong column were ordered in the backend. With this commit, the original index will be put in the request, so always the correct column is ordered.

[github-actions[bot]]

Stale pull request message