Sorted column should drive the text in Pager tooltips

The page navigation links always display tooltips using data from the first column, and not the column being used to sort.

Example:

• load http://build.fluidproject.org/infusion/demos/pager/demo.html
• sort by email
• hover over page 2 link.
• tooltip reads "Arturo Hayhurst | Brendan Anagnos" but it should be "arturo.hayhurst@local.host | brendan.anagnos@local.host"