The subcomponent manager populates the item library.
This means the ItemLibraryView has to be properly
initialized before we call m_subComponentManager->update().

I added a helper function and call it from activateAutoSynchronization(),
after all views have been attached.

Change-Id: Ie802f93c7d0a76b42160d4a92e8448e900380b71
Reviewed-by: Thomas Hartmann <Thomas.Hartmann@digia.com>