QtIFW

Fix a problem that isOfflineOnly returned true.

This happend even in updater/ package manager mode when the
original install was done using an offline installer. This can
only be true if we are an installer.

Change-Id: I345453dfc870b9945295371f5d6f8cb4a0057a50
Reviewed-by: Tim Jenssen <tim.jenssen@nokia.com>
Reviewed-by: Niels Weber <niels.2.weber@nokia.com>