Fixes O&M Redmine DR 14448 - which concerns displaying changes to a color set just after the changes are saved,
instead of after the ColorScaleManager is closed.
Change-Id: I0156612302853141392c263eab8b54a16c3be7a3
Former-commit-id: 25e4ed8d51 [formerly 8c6e70ccab [formerly 44f6bf08a72b5450d6d0db40ff49dd5123cf811c]]
Former-commit-id: 8c6e70ccab
Former-commit-id: 69450976c8