Seen in demo: with &date=yesterday, the All Websites shows stats of Sept 15th (since today is the 16th in UTC). But the calendar shows "16th". Instead the calendar should always reflect the data displayed.
(In ) Fixes #3378
Add call to Controller->setDate() to ensure the date used by the calendar is the same as the date used by API
Also refactoring the standalone/index.tpl templates into 1 template since they were mostly duplicates