Merge pull request #20940 from jimporter/ringtones-exclusive-mode

Bug 1020771 - When ringtone application is in background, music volume c...
Merge pull request #20653 from mnjul/bug_1025845_lockscreen_mediaplayer_widget

Bug 1025845 - [VsD Refresh] Lockscreen Visual Refresh > Media Player widget icons wrong. r=timdream
Merge pull request #20964 from evanxd/bug-1029254

Bug 1029254 - [Calendar] Tag marker says stationary as you scroll in calendar event r=mmedeiros
Merge pull request #20991 from KevinGrandon/land_bug_1026792

Bug 1026792 - [Rocketbar] Rocketbar search should be cancelled when the device sleeps, or gets locked