EBRDD: improvements

Makefile

src/ui/IconManager.java

src/ui/RequirementPanel.java

src/ui/TGUIAction.java

src/ui/ebrdd/EBRDDERB.java

src/ui/ebrdd/EBRDDERC.java

src/ui/ebrdd/EBRDDESO.java

src/ui/ebrdd/EBRDDSequence.java

src/ui/ebrdd/TGConnectorEBRDDERC.java

src/ui/tree/DiagramTreeRenderer.java