Bug 61172 [rulers] quick assist hides quickfix icon
1) mistype a method call ->you get a quick fix but the quick fix is overlayed by the quick assist 2) press the quick assist icon ->you the the quick fix proposals
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/correction/QuickAssistLightBulbUpdater.java
Annotation annotation= new Annotation("org.eclipse.jdt.ui.error", false, null); 
			AnnotationPreference preference= EditorsUI.getAnnotationPreferenceLookup().getAnnotationPreference(annotation);
			if (preference != null)
				LAYER= preference.getPresentationLayer() + 1;
			else
				LAYER= IAnnotationAccessExtension.DEFAULT_LAYER + 1;
			
		}
		
		private Image fImage;
		
		public AssistAnnotation() {
		}
		
		/*
		 * @see org.eclipse.jface.text.source.IAnnotationPresentation#getLayer()
		 */
		public int getLayer() {
			return LAYER;
		}
		
		private Image getImage() {
			if (fImage == null) {
				fImage= JavaPluginImages.get(JavaPluginImages.IMG_OBJS_QUICK_ASSIST);
			}
			return fImage;
		}
		/* (non-Javadoc)
		 * @see org.eclipse.jface.text.source.Annotation#paint(org.eclipse.swt.graphics.GC, org.eclipse.swt.widgets.Canvas, org.eclipse.swt.graphics.Rectangle)
		 */