jquery/jquery-mobile — pull request #3824 by gabrielschulhof (2012-03-15 15:46:01+00:00)
Title: Select placeholder fix

The placeholder ends up in the list of choices when you have optgroups, because ```_buildList()``` gets called when the user makes a choice. This does not happen when there are no optgroups.

Includes a unit test to make sure the placeholder acquires the ui-selectmenu-placeholder class after the user-choice-induced rebuild.