Enable / disable on attacks of attack graphs

src/attacktrees/Attack.java

src/ui/AttackTreePanelTranslator.java

src/ui/CanBeDisabled.java

src/ui/ColorManager.java

src/ui/GTURTLEModeling.java

src/ui/TDiagramPanel.java

src/ui/TGComponent.java

src/ui/atd/ATDAttack.java

src/ui/window/JDialogAvatarProperty.java