[BUGFIX beta] Added tabindex bound property and relevant test to link-to helper
[BUGFIX beta] Fix QP link issue upon app reload

Fixes a bug reported by @mixonic where some links that
didn’t specify query params were resetting query
params set from the URL at boot time.
Sync route-recognizer to 8e1058e.
Fix cherry-picked class-name-binding test.
Fix cherry-pick issue with {{link-to}} currentWhen.