ENYO-348: Fixed list re-rendering issue, cleanup and code reorg

* Fixed list re-rendering issue
* Fixed an issue with dumbly trying to load samples that didn't exist. Smarter is better!
* Major cleanup and code reorg
* Decoupled loading samples from opening samples
* locale is never set to 'undefined'

Enyo-DCO-1.1-Signed-off-by: Blake Stephens <blake.stephens@lge.com>