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
if (i.getData() instanceof IJavaElement) {
					IJavaElement je= (IJavaElement) i.getData();
					if (je.getElementType() == IJavaElement.IMPORT_CONTAINER || isInnerType(je)) {
						setExpanded(i, false);
						return;
					}
				}
			}
			super.internalExpandToLevel(node, level);
		}
		
		private boolean isInnerType(IJavaElement element) {
			if (element != null && element.getElementType() == IJavaElement.TYPE) {
				IType type= (IType)element;
				try {
					return type.isMember();
				} catch (JavaModelException e) {
					IJavaElement parent= type.getParent();
					if (parent != null) {
						int parentElementType= parent.getElementType();
						return (parentElementType != IJavaElement.COMPILATION_UNIT && parentElementType != IJavaElement.CLASS_FILE);
					}
				}
			}
			return false;		
		}
	}
	
	
	private class OutlineContentProvider extends StandardJavaElementContentProvider {