In newer Embers jQuery is removed. There is a `find` but it only returns
one element and not a jQuery selector. This patch migrates our code to a
new helper `queryAll` which allows us to remove the global.
We used many global functions to handle tests when they should be
imported like other libraries in our application. This also gets us
closer to the way Ember CLI prefers our tests to be laid out.
This commit introduces a mutation on input value given to select-box-kit when value is empty. The refactoring required to avoid this would be too heavy atm, but ultimately we would want to avoid this.
