learningequality/ka-lite — pull request #400 by bcipolli (2013-08-03 10:25:53+00:00)
Title: Polyline cleaning

This addresses #350

Background:
Since we don't support all KA exercises, we currently remove them from the topic tree. When we remove all exercises of a topic with no videos, we remove the topic.

Issue:
While we deleted topics, we didn't update the knowledge map to properly remove polylines of deleted topics.

Fix:
Do that!

Testing:
Pull, load up the topic tree, click around! Note issue #275