Code review comment for lp://qastaging/~phablet-team/network-manager/lp1361864-2

Tested arale ( rc-proposed/meizu.en #58 ).

Ran the Basic test cases from:

https://wiki.ubuntu.com/Process/Merges/TestPlans/network-manager

Also verified that the new 'Preferred' functions work as expected.

Updating the silo (006) to 'Tested'.