When using column search field it wrongly uses OR in place of AND

[kolorafa]

Global single search field - search columns with OR
like: https://datatables.net/examples/basic_init/state_save.html

Column search fields - search with AND
like: https://datatables.net/examples/api/multi_filter.html

[tigrang]

Thanks for the pull request!

I actually noticed this odd behavior over the weekend.

I will review and merge soon.

[challgren]

Please merge this as this is needed

[challgren]

Thank you!