emberjs/ember.js — pull request #4508 by hcnguyen5 (2014-03-11 22:20:33+00:00)
Title: [BUGFIX] Close #3639 - Merge Nopik changes to sortable mixin to fix obse...

Merge Nopik changes to sortable mixin to fix observer leaking into latest ember.js.
Per hjdivad suggestion, add an arrayObserver to sortProperties