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
return getCollator().compare(name1, name2);
		}
		private boolean isSuperType(ITypeHierarchy hierarchy, IType def1, IType def2) {
			IType superType= hierarchy.getSuperclass(def1);
			if (superType != null) {
				if (superType.equals(def2) || isSuperType(hierarchy, superType, def2)) {
					return true;
				}
			}
			IType[] superInterfaces= hierarchy.getAllSuperInterfaces(def1);
			for (int i= 0; i < superInterfaces.length; i++) {
				IType curr= superInterfaces[i];
				if (curr.equals(def2) || isSuperType(hierarchy, curr, def2)) {
					return true;
				}		
			}
			return false;
		}
	}
	
	
	private class LexicalSortingAction extends Action {
		
		private static final String STORE_LEXICAL_SORTING_CHECKED= "LexicalSortingAction.isChecked"; 
		
		private TreeViewer fOutlineViewer;
		private LexicalSortingAction(TreeViewer outlineViewer) {
			super(TextMessages.getString("JavaOutlineInformationControl.LexicalSortingAction.label"), IAction.AS_CHECK_BOX); 
			setToolTipText(TextMessages.getString("JavaOutlineInformationControl.LexicalSortingAction.tooltip"));