ivaynberg/select2 — pull request #2326 by dawnhammond (2014-04-28 21:56:27+00:00)
Title: Fix issue with dropdown menu getting stuck in IE when using multiselect

Fixes issue #2084 with the dropdown menu getting stuck in IE. When the placeholder is removed in IE, an input event is fired: https://connect.microsoft.com/IE/feedback/details/781434/change-of-focus-to-input-with-placeholder-triggers-input-event.