Bug 971459 - [System2] Instantiable Applications.
Bug 976846 - Update active app earlier
Merge pull request #16682 from alivedise/bugzilla/976846_bubble-tea/update-active-app-early

Bug 976846 - Update active app earlier, r=timdream
Merge pull request #16779 from mpizza/Bug_971459_fixed

 Bug 971459 - [System2] Instantiable Applications. r=alive.
Bug 971458 - [System2] Instantiable AppWindowFactory