removed compartment separators (borders) in states and regions.

plugins/org.yakindu.sct.statechart.diagram/src/org/yakindu/sct/statechart/diagram/editparts/RegionCompartmentEditPart.java

@@ -48,6 +48,7 @@ public class RegionCompartmentEditPart extends ShapeCompartmentEditPart {
 	protected IFigure createFigure() {
 		ShapeCompartmentFigure figure = (ShapeCompartmentFigure) super
 				.createFigure();
+		figure.setBorder(null);
 		return figure;
 	}
 

plugins/org.yakindu.sct.statechart.diagram/src/org/yakindu/sct/statechart/diagram/editparts/StateFigureCompartmentEditPart.java

@@ -63,6 +63,7 @@ public class StateFigureCompartmentEditPart extends
 				.createFigure();
 		figure.getContentPane().setLayoutManager(
 				new StateFigureCompartmentLayout());
+		figure.setBorder(null);
 		return figure;
 	}
 

plugins/org.yakindu.sct.statechart.diagram/src/org/yakindu/sct/statechart/diagram/editparts/StateTextCompartmentEditPart.java

@@ -32,6 +32,7 @@ public class StateTextCompartmentEditPart extends ResizableCompartmentEditPart {
 		ResizableCompartmentFigure figure = (ResizableCompartmentFigure) super
 				.createFigure();
 		figure.getContentPane().setLayoutManager(new StackLayout());
+		figure.setBorder(null);
 		return figure;
 	}