Merge pull request #21001 from sfoster/bug-1023863-dividers

Bug 1023863 - Adjust divider margins
Merge pull request #21253 from steveck-chung/bug-1030160

Bug 1030160 - [Messages][MMS] Subject is considered empty even if it has several empty lines
Conflicts:
	apps/sms/test/unit/thread_ui_test.js
Merge pull request #21372 from KevinGrandon/bug_1033451_collection_pin_perf

Bug 1033451 - [Smart Collection] Adding collection to top is slow to draw and load
Merge pull request #21118 from gmarty/Bug-1027391-SIM-lock-shows-transparent-status-bar

Bug 1027391 - SIM lock shows a transparent status bar