Notification object - preparing for pagination

Related to blueprint nailgun-objects-flow

Related to blueprint nailgun-rest-api-pagination

Change-Id: Icec50899f1048a6360740f03f3879c2a25067ea9
LESS refactoring

blueprint ui-refactor-less-styles

Change-Id: I3e96068227957796eae8daaeb15ca1f51e46714d
Merge "Notification object - preparing for pagination"