Resolving bug on several connectors from activities in activity diagrams

src/main/java/ui/TDiagramPanel.java

src/main/java/ui/TGComponent.java

src/main/java/ui/TGConnectingPoint.java

src/main/java/ui/TGConnector.java

src/main/java/ui/avatarad/AvatarADConnectingPoint.java