Level 3: JS errors, page load sometimes incomplete

[jnga]

On Level 3 pages, JS errors sometimes appear and the page does not always fully load. (Ember branch)

On Chrome, the following appears sometimes, most notably when returning to the Level 3 page after having visited a species page:

Uncaught TypeError: Cannot call method 'compute' of undefined results.js:105

In Firefox, when browsing to a Level 3 page (such as Woody Angiosperms or Non-thalloid Aquatics), often get this error, after which the image thumbnails can be blank:

App3.filter_controller is undefined var other_taxa = App3.filter_controller.compute(filter); results.js line 105

In Safari on Mac OS X, some JS errors appear and the page does not always fully load. Typically both of the errors below appear, but sometimes just the first one does:

• TypeError: 'undefined' is not an object (evaluating 'App3.filter_controller.compute') results.js:318
• TypeError: 'undefined' is not an object (evaluating 'App3.filter_controller.add')

[jrrickerson]

Seeing these issues during branch integration. I've put the specific places in results.js that reference the filter_controller behind the filter_controller_is_built Deferred that Brandon created.

[jnga]

So far this issue seems fixed with commit 408bcfd.