Merge pull request #20378 from justindarc/bug1015385

Bug 1015385 - [Camera] Implement new startup loading events
Conflicts:
	apps/camera/js/app.js
Merge pull request #20319 from jimporter/ringtones-manage-highlight

Bug 1020845 - [Ringtones] Manage Ringtones' list need a press state
Merge pull request #20579 from fcampo/operator-variant-jshint-1026034

Bug 1026034 - [OperatorVariant] Add jshint setup (r=cjc)
Merge pull request #20296 from mcjimenez/bug1023142

Bug 1023142 - Adapt the WifiManager calls to use the correct object types (r = fcampo)