Bug 971648 - Add warning message if there is no
 manifest.webapp or update.webapp in an app directory
Bug 922128 - [Clock] Defer Panel loading and execution. r=mcav

r=mcav
Merge pull request #16526 from mcav/pr-16264

Bug 922128 - [Clock] Defer Panel loading and execution. r=mcav
Merge pull request #16502 from vijayanandh/webappwarn

Bug 971648 - Add warning message if there is no r=@yurenju
NOBUG - Enable Travis-CI for bubble-tea branch
Bug 971546 - [System2] Instantiable Screenshot