Revert "Merge pull request #16183 from mcav/alarm-volume"

This reverts commit bb7e44e428640f15e1c07b0ab89c712e797fb9ea, reversing
changes made to 6274b3645b3d41df4aa5a55398b5d106edf1c528.
Merge pull request #17846 from evanxd/bug-990334

Bug 990334 - [Calendar] Newly perma-red marionette test, marionette/today_test.js
bug 982006

* Use new error nsresult values in download notifications.
* Update mock_download_ui.js based on addition of 'ERRORS' to DownloadUI.
* added tests for new Downloads API errors in download notifications test
* added new tests for modal dialog changes in app modal dialog test
* AppModalDialog will ignore titles that contain the application URL or origin and instead
  use the app name if it is available. If not, it will simply use an empty string.

r=alive, crdlc
Merge pull request #16262 from benfrancis/959694-master

Bug 959694 - Combine Rocketbar and statusbar r=kgrandon r=alive
Bug 989880 - [Keyboard] Make demo keyboard not reflow on any key presses. r=janjongboom
Merge pull request #17303 from nullaus/bug982006

bug 982006
Bug 939197 - [Clock] Alarms need volume control. r=millermedeiros
Bug 987350 - Migrate alarm_test.js to use new view code
Merge pull request #17849 from guilherme-pg/findmydevice

Bug 938896 - Find My Device client.
Bug 990798 - [Clock] Disable intermittent failing test, Alarm Update alarm name and time
Bug 983171 - Disable intermittent test, manipulate screenLock settings passcode is enabled, then get changed successfully
Merge pull request #17860 from mcav/alarm-volume-2

Bug 939197 - [Clock] Alarms need volume control. r=millermedeiros
Merge pull request #17304 from mcav/timerrest

Bug 982789 - [B2G][Clock]Set Timer intermittently starts countdown at incorrect starting point. r=millermedeiros
Bug 986206 - Report filenames on test failures
Merge pull request #17603 from mikehenrty/bug-975973-lite

Bug 975973 - [DSDS] The "data circle" icon is not made smaller for DSDS ...
Bug 983074 - [MADAI][SMS] @2.25x assets update for SMS
Merge pull request #17838 from SasikalaParuchuri/Bug_984841_Keyboard_NotShown_inNewmessageScreen

Bug 984841 - [Messages] The cursor and the keyboard are not shown when New message screen is opened r=schung
Merge pull request #17850 from gasolin/issue-990561

Bug 990561 - [MADAI][System] @2.25x assets update for Emergency Call, r=greg
Revert "Merge pull request #17860 from mcav/alarm-volume-2"

This reverts commit 6e6cf2c0e135542da4aacce710cd534794b9627e, reversing
changes made to c648699d636414c50cf29ea3173058a0c78a855f.

Conflicts:
	apps/clock/js/panels/timer/main.js
Bug 973446 - [settings] refactor B2G improve and feedback panel with AMD pattern