mleibman/SlickGrid — pull request #659 by icoxfog417 (2013-06-28 05:55:59+00:00)
Title: fix issue #563 IE8 throws exception at clearTextSelection() in slick.grid.js

Fix issue #563 , IE8 cause error on clearTextSelection() in slick.grid.js.
I refferd this document for fix it.
https://github.com/mootools/mootools-more/commit/eba723edc4a