Bug 1032068 - Maintain id pool of activity chaining instances to keep only one chaining
Merge pull request #21258 from alivedise/bugzilla/1032068_master/drop-activity-on-demand

Bug 1032068 - Maintain id pool of activity chaining instances to keep on...r=timdream
Bug 962434 - Moving value selector into subcomponents of an appWindow. Improving its visibility a11y. r=alive