LP#494734 Properly set id values for adv_global_trow

LP#494734 Properly set id values for adv_global_trow

This adds two new entries, adv_global_trow2 and adv_global_trow3 to replace the previously empty id values.
This allows the user to enter search terms in any of the 3 search boxes, hit the Enter key, and then get results.
Previously, it was only possible to start a search by using the first box, adv_global_trow, or by adding a new row and then
pressing Enter on the keyboard, or by clicking the "Submit" button.

Signed-off-by: Michael Peters <mrpeters@library.in.gov>