* init dropdown
* add dropdown to storybook
* move http requests components into container
* add event handler for selecting new time window
* no need for this. in the template
* filter bar chart and table
* add bar chart transitions
* handle Last 12 Months in dropdown
* don't use fake data
* start tests
* add jsdoc and notes for storybook
* add container to storybook
* compute filteredCounters when counters change
* move static dropdown options to template
* add tests
* style the dropdown
* use this.elementId
* fix linting errors
* use ember array extensions
* use fillIn instead of page object and make dom assertions consistent
* calculate the correct percent change between months
* use data-test selector instead of id
* show plus or minus next to percent change
Noelle Daley