Merge pull request #23440 from benfrancis/1058096

Bug 1058096 - Add show windows button to Rocketbar on Browser start page r=kgrandon
Merge pull request #23153 from gmarty/Bug-1038723-Utility-Tray-Visual-Refresh

Bug 1038723 - [Utility Tray] Visual Refresh
Merge pull request #23488 from jimporter/ringtones-l10n-part-deux

Bug 1027995 - [followup] Fix localization
Merge pull request #23452 from jrburke/bug1052951-email-sig-upgrade

Bug 1052951 - [email] signature upgrade experience r=asuth
Merge pull request #23479 from vingtetun/bug1059164

Bug 1059164 - Ensure the zoom-out animation is async. r=etienne
Merge pull request #23209 from arcturus/bug-1042591

Bug 1042591 - [Contacts][ICE] Display contacts from ICE group r=sergi
Merge pull request #22391 from mancas/bug1046202

Bug 1046202 - Copy improvement when battery is almost empty
Merge pull request #23148 from wilsonpage/1011601

Bug 1011601 - [Dialer] Update to use <gaia-header>
Merge pull request #23455 from KevinGrandon/bug_1060218_system_cleanup_marionette_tests

Bug 1060218 - [System] Minor marionette test cleanup
Merge pull request #23442 from jrburke/bug1060020-shared-font-size-util-space

Bug 1060020 - font_size_utils.js: whitespace before/after header.textContent reduces size of text r=vingtetun
Merge pull request #23203 from wilsonpage/1011604

Bug 1011604 - [Messages] Update to use <gaia-header>
Bug 1041372 - [User Story] Rocketbar behavior for fullscreen apps with navigation chrome r=vingtetun
Merge pull request #23448 from pivanov/bug-1046338

Bug 1046338 - (2.1-visual-refresh) Media Sound Refresh
Merge pull request #23474 from pivanov/bug-1059226

Bug 1059226 - [Status Bar] Visual Refinements Data connection Height
Bug 1060475 - [email] DEBUG=1 in firefox nightly not working with emailjs changeset
Merge pull request #23445 from eeejay/bug-1060147

Bug 1060147 - Hide identification overlay with visibility: hidden.
Merge pull request #23443 from KevinGrandon/bug_1041372_fullscreen_rocketbar

Bug 1041372 - [User Story] Rocketbar behavior for fullscreen apps with navigation chrome
Merge pull request #23446 from KevinGrandon/bug_1048639_vertical_home_guard_try_catch

Bug 1048639 - [VerticalHomescreen] Guard against empty entry points
Merge pull request #23280 from hfiguiere/bug1054105

Bug 1054105 - Move the background colour to only the body to simplify layers r=johu
Merge pull request #23334 from azasypkin/bug-1041765-thread-view-redesign

Bug 1041765 - [Messages] Thread view redesign. r=schung