Do not generate a silent assertion for an address in a transition state.

fixes #3515
Add Selenium tests to check for transition states.
Allow silent assertions to be fetched post-verification, even if marked "transition_to_secondary"

* Keep a bit in local storage whenever an address is verified that indicates
 that the transition_to_secondary state should be ignored whenever fetching a silent asseriton.
* Reset all caches when getting a silent assertion.