Bug 573710: [UI-Actions] Enhance HandlerCollection
  - Extract interface and add standard implementation to
    ecommons.commands.core
  - Add option to flag/group handlers in HandlerCollection
  - Add support for activation expression in ContextHandlers
  - Add support to deactivate handlers in ContextHandlers
  - Remove managment of handlers in ControlServiceUtil
    (use ContextHandlers instead)

Change-Id: Ia737ab04a1671db0f2a19fa99d1c1ae07243635e
15 files changed