Setup options page checks for general setup of API Levels, Signing Keys
and Devices. It is meant to become a central point for BlackBerry settings.

Adding BlackBerryConfigurationManager::settingsChanged signal
to notify about any change to BBConfig settings.

Fixing BlackBerrySigningUtils to correctly ask for password and reopen
the certificate in case an invalid password is entered and a generic
ResultCode::Error happens.

Fixing header define for blackberryinstallwizard.h

Fixing URL for BlackBerry Legacy Keys.

Change-Id: I1c4592c03ab07678ef829b85ce7b13457b9304a9
Reviewed-by: David Kaspar <dkaspar@blackberry.com>
Reviewed-by: Nicolas Arnaud-Cormos <nicolas@kdab.com>