Arrange top level objects of editor.
1.The domUtil has cursorChanger and selector. They were called cursor and domSelector.
2.The userEvent has editHandler and viewHandler. They were called businessLogic and presentationLogic.
3.Move businessLogic.loadAnnotation to command.reset.
4.Move relationsPerEntity to a property of the model.
5.Move clipBoard to a property of the editorState.
6.Rename editorState.buttonState to editorState.buttonStateHelper.
Bug fix: levemessage was shown always once edit.