sync to Contacts after install/upgrade

Since GPGA's key list screen is now based on the Contacts database, the
key list will be empty after upgrading until GPGA has synced to the
Contacts database.  Therefore, trigger a sync as soon as possible, once all
of the native bits are installed and setup.
hide any active ActionBar when switching tabs

This will hide any active ActionBar rather than just the "Find Keys" one.
ActionBar for keyserver send/receive on public key listing

This adds rudimentary support for sending keys to the keyserver, and
updating keys in the keyring from the keyserver.

refs #3055
tame the debug messages for release

Lots of unnecessary debug messages... purge!