All tabs have active class

Problem/Motivation

It appears that Drupal.behaviors.panels_ajax_tabs calls paenls_ajax_tabs_trigger() which sets the active tab list items but then the tabs are iterated over again and the list item classes are reset (all to active). This means that when the behavior runs all list items get an active class which breaks functionality.

Proposed resolution

Remove the line of code that is resetting all of the list items to active.