Charts release version

Fixes a number of issues with the charts page.
Note: whitespace off compare view: (https://github.com/onaio/zebra/compare/charts-release-version?expand=1&w=1) maybe easier for review than whitespace on, I used lighttable's smart indent on ona.api.charts.
Thanks @royrutto! It was a stray :use that I forgot to take out; thanks for catching!