Bug 1079519 - Unable to play video clips during WEBRTC video call

Do not hide the back button under the in use overlay. Handle the case where we try to resume a video while a WebRTC call is in progress

do not hide the pick activity back button under the in-use-error overlay

use a timeupdate event instead of playing event

address review comments
Bug 1095805 - [System][SHB] Enable software home styles for crash dialog r=mhenretty
Bug 1092143 - [Costcontrol] Widget in utility tray has some visual defects when the balance is lower than balance alert limit