Apple has updated its Apple Store app with new features. Apple Store now lets users define custom configurations for new Macs and offers a special in-store mode to facilitate getting support. Version 1.3 of the free iOS app is now available in the App Store. While in an Apple retail store, customers can now view the length of and join a queue for retail or technical support and see the next workshop on the store’s event calendar. Users of this app can also now order customised Macs within the app itself. This is a very useful app but we would really like to see an iPad optimized version – hopefully…