Fix error links in sandbox validation tool

This should fix a couple of issues:
* double request for search results on the shipments page
* validation error links that do not work i.e. matching shipments list is empty - need to verify this on windows
* after 'save changes' the list of remaining validation errors should be updated

Those issues were caused by incorrect handling of array params by the old query params implementation, so the solution was to upgrade ember (to a canary version) and use the new query params api.