* promote new session manager to beta
* hide old sessions section when new dm enabled
* use correct logic
* add new ViewUserDeviceSettings action
* replace device management ctas with viewUserDeviceSettings
* test SecurityUserSettingsTab
* more complete mocks
* more thorough mocks
* more mocks
* test LabsUserSettingsTab
* lint
* updated copy
* update snaps for new copy
Overhaul the device list in the "Security and Privacy" settings tab to include device trust status, provide buttons for verifying unverified devices, and improve overall usability and style. This should now be the primary interface for checking and changing the trust status of your own devices, rather than looking at your own user profile in the right panel.
