`jQuery.Deferred exception` is adding noise to some feature specs

[ragesoss]

This doesn't appear to be causing any specs to fail, but it may still be a flaw in the javascript code.

There are several places this happens in the travis builds, such as:

Students Page
  should display a list of students
jQuery.Deferred exception: undefined is not an object (evaluating 'e.list.childNodes') getItemSource@http://127.0.0.1:35759/assets/javascripts/main.c20a9f0b8be8c04396ea.js:39:202516
http://127.0.0.1:35759/assets/javascripts/main.c20a9f0b8be8c04396ea.js:39:204486
n@http://127.0.0.1:35759/assets/javascripts/main.c20a9f0b8be8c04396ea.js:39:204517
exports@http://127.0.0.1:35759/assets/javascripts/main.c20a9f0b8be8c04396ea.js:39:204555
start@http://127.0.0.1:35759/assets/javascripts/main.c20a9f0b8be8c04396ea.js:30:197971
exports@http://127.0.0.1:35759/assets/javascripts/main.c20a9f0b8be8c04396ea.js:30:200162
http://127.0.0.1:35759/assets/javascripts/main.c20a9f0b8be8c04396ea.js:39:210927
f@http://127.0.0.1:35759/assets/javascripts/jquery-uls.js:1:78517
http://127.0.0.1:35759/assets/javascripts/jquery-uls.js:1:118284
n@http://127.0.0.1:35759/assets/javascripts/raven.c20a9f0b8be8c04396ea.js:1:5394 undefined

[ragesoss]

This doesn't appear to be a problem anymore.