REF #4122 circulars
Merge remote-tracking branch 'origin/master'

Conflicts:
	src/main/css/alv-ch-circular.css
	src/test/unit/module/alv-ch-circular.admin.system-messages.unit.spec.js
	src/test/unit/module/alv-ch-circular.common.messages.unit.spec.js
	src/test/unit/module/alv-ch-circular.common.subscriptions.unit.spec.js
REF #4122 circulars