Bug 62896 [misc] Quick Outline should not show override indicators if decorator disabled
I20040519 The quick outline shows override indicators no matter whether the Override indicator decorator is enabled in the prefs or not. We should only install the decorator if the prefs says so since this is a performance saver.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/JavaOutlineInformationControl.java
getTreeViewer().reveal(selectedElement);
			tree.setRedraw(true);
		}
		
		/**
		 * {@inheritDoc}
		 */
		public Object[] getChildren(Object element) {
			if (fShowOnlyMainType) {
				if (element instanceof ICompilationUnit) {
					element= getMainType((ICompilationUnit)element);
				} else if (element instanceof IClassFile) {
					element= getMainType((IClassFile)element);
				}
				if (element == null)
					return NO_CHILDREN;
			}
			
			if (fShowInheritedMembers && element instanceof IType) {
				IType type= (IType)element;
				if (type.getDeclaringType() == null) {
					ITypeHierarchy th= getSuperTypeHierarchy(type);
					if (th != null) {
						List children= new ArrayList();
						IType[] superClasses= th.getAllSupertypes(type);
						children.addAll(Arrays.asList(super.getChildren(type)));
						for (int i= 0, scLength= superClasses.length; i < scLength; i++)
							children.addAll(Arrays.asList(super.getChildren(superClasses[i])));
						return children.toArray();
					}