Bug 991043 - [Gaia] [Settings] bind _responseHandler to xhr.onreadystatechange
Bug 991354 - [Camera][Madai] X in cancel button not centered. Pick activity UI
Bug 991094 - [Building Blocks] Create Recipients pills as BB component
Revert "Merge pull request #17807 from huchengtw-moz/system2/Bug_971554-reland-2"

This reverts commit 3c23b5013e62d6f059d9a0b9f9e8c8db0c3aa2fe, reversing
changes made to 716250e989d516c6e0c1bf5bf0d69417428f17c2.

Conflicts:
	apps/system/js/bootstrap.js
Bug 991813 - [Camera] Zoom Bar jumps on orientation change
Merge pull request #17898 from cctuan/991043

Bug 991043 - [Gaia] [Settings] bind _responseHandler to xhr.onreadystate...
Merge pull request #17955 from justindarc/bug991813

Bug 991813 - [Camera] Zoom Bar jumps on orientation change
Merge pull request #17928 from justindarc/bug991354

Bug 991354 - [Camera][Madai] X in cancel button not centered. Pick activ...
Merge pull request #17953 from nucliweb/991094-Recipients-BB

Bug 991094 - [Building Blocks] Create Recipients pills as BB component r=me
Bug 989974 - Disable intermittent failing unit test, system/HardwareButtons press and release sleep (screen enabled)
Revert (manually revert) "Bug 933035 - [B2G][System][Lockscreen] The
phone goes to sleep on the lockscreen even though screen timeout is set
to never", which seems caused the Bug 980559.

    This reverts commit d808643fb7fca3fe6ffd1e415c135fe2d482e7df.