Convert to use Orchestra\Extension::activated() over deprecated Orchestra\Extension::isActive().

Signed-off-by: crynobone <crynobone@gmail.com>
Improve safe mode notification using the new Orchestra\Messages::extend() API

Signed-off-by: crynobone <crynobone@gmail.com>
Small improvement to migration process during installation

Signed-off-by: crynobone <crynobone@gmail.com>
Clean-up use of handles('orchestra/foundation') to handles('orchestra');

Signed-off-by: crynobone <crynobone@gmail.com>