Bug 968709 - Allow system app to listen to bluetooth-pairing-request.
Bug 1011469 - Intermittent in cost control tests, tapping Next button has no effect
Bug 881469 - [Messages] Implement Navigation object r=azasypkin,schung

This commit implements a Navigation abstraction to handle navigating between
panels. It also introduces the concept of panels.

Each panel can have 4 lifecycle methods: beforeEnter, afterEnter, beforeLeave,
beforeEnter. These methods either return nothing or a promise.
Merge pull request #18524 from JaminLiu/BT_pair_marionette

Bug 968709 - Allow system app to listen to bluetooth-pairing-request. r=echou
Merge pull request #19633 from viorelaioia/bug_1011469_v2.0

Bug 1011469 - Intermittent in cost control tests, tapping Next button ha...
Bug 1007591 - [SMS] Make SMS react upon the IAC broadcast from Cost Control application to friendly mute Cost Control specific SMS