Merge pull request #21589 from azasypkin/bug-1034600-suggestions

Bug 1034600 - [Messages] Suggestions list is badly located. r=julien
Conflicts:
	apps/sms/test/unit/thread_ui_test.js
Merge pull request #21858 from KevinGrandon/bug_1037256_icon_installation_location_2

Bug 1037256 - [Vertical Homescreen] Newly installed apps are placed into a new group if homescreen has been killed