Fix an issue with returning to a the initial page in Quicksand

Summary: Fixes T7058. We weren't propagating state properly so some other code ended up doing the wrong thing.

Test Plan:

• Clicked from Home -> Anything -> Home under Quicksand, saw reloads with no double requests.
• Used "back", saw back button work properly.

Reviewers: btrahan, chad

Reviewed By: chad

Subscribers: epriestley

Maniphest Tasks: T7058

Differential Revision: https://secure.phabricator.com/D12190