Save on "ApplicationSuspended" state for all platforms.

Change-Id: I293d52881d2d88481c13689eb4a8bfa9b332c9a2
Reviewed-by: Andrew Knight <andrew.knight@digia.com>
Simplify the "isLocked" logic for the pages

Use a binding instead.

Change-Id: If302c9a5fa7f4b37d1be1fbbbf4771e327d2c26f
Reviewed-by: Andrew Knight <andrew.knight@digia.com>