Currently when changing the website, the date or the period, Piwik will reload the whole page, which is long and slow.
Once we do #103 , we can call a JS function when changing the state. This JS function would set the right state in the URL fragment and the page would be reloaded with the right content.
This is tighyly coupled to #103 and requires significant testing or all UI elements.
actually this is duplicate of #103 as implementing 103 should lead to this feature.