ipython/ipython — pull request #6747 by jdfreder (2014-10-20 18:41:55+00:00)
Title: Make Selection widgets respect values order.

This PR suggests an alternative method for storing selection widget state in the backend. Instead of the primary store being a dictionary, a tuple of tuples is used. i.e. ((k1, v1), (k2, v2), (k3, v3), ...)

@rmenegaux and @jasongrout