Update on dialog windows: graphical enhancements

modeling/AVATAR/CoffeeMachine_Avatar.xml

modeling/DIPLODOCUS/ZigBeeTutorial.xml

src/main/java/ui/avatarpd/AvatarPDProperty.java

src/main/java/ui/avatarrd/AvatarRDRequirement.java

src/main/java/ui/tmlcp/TMLCPForLoop.java

src/main/java/ui/window/JDialogAvatarProperty.java

src/main/java/ui/window/JDialogAvatarState.java

src/main/java/ui/window/JDialogBase.java

src/main/java/ui/window/JDialogConstraint.java

src/main/java/ui/window/JDialogModelChecking.java

src/main/java/ui/window/JDialogMultiString.java

src/main/java/ui/window/JDialogMultiStringCP.java

src/main/java/ui/window/JDialogRequirement.java

src/main/java/ui/window/JDialogSelectAvatarBlock.java

src/main/java/ui/window/JDialogSelectTMLComponent.java

src/main/java/ui/window/JDialogSelectTMLNodes.java