reviewed part of tooling.base.ui

...tiss/tooling/base/ui/editpart/ConnectionEditPartBase.java

...rtiss/tooling/base/ui/editpart/ConnectorEditPartBase.java

...fortiss/tooling/base/ui/editpart/DiagramEditPartBase.java

...fortiss/tooling/base/ui/editpart/ElementEditPartBase.java

...s/tooling/base/ui/editpart/ExtendedLayerRootEditPart.java

...s/tooling/base/ui/editpart/FreeConnectorEditPartBase.java

...rtiss/tooling/base/ui/editpart/GraphicalEditPartBase.java

...tiss/tooling/base/ui/editpart/PositionedEditPartBase.java

...tooling/base/ui/editpart/StickyConnectorEditPartBase.java