the order in which containments were restored used to be quite random:
ensure that's ordered by id this makes the shell startups be more reproduceable
from one to another, if a new containment arrives, ensure it's inserted
maintaining id order
containment::appelts() will need the same treatment
adds a test as well that checks the order is right
Change-Id: Ie1b278e5b83d7e3645f7293bf6d030aa7f43a221
if a containment's lastScreen is not -1 (and a valid screen)
*and* its activity() is not the current one, its QML
will *not* be loaded, therefore it would dangle blocking
corona::startupCompleted until the activity is selected
Change-Id: I6757d29240a012377e9ff0a22fe16541ea712ee6
