Bug 180701 [JFace] API - Popup dialog is creating image descriptors every time it is opened
We are not caching the imageDescriptors from PopupDialog but are recreating them all of the time. This is likely not a serious issue but it will generate garbage. Also the images are not looked up using bundles so they cannot be overridden in other Locales. As they are currently symmetric this is not an issue but they should be looked up in the same way we do it in JFaceResources when this fixed.
bundles/org.eclipse.jface/src/org/eclipse/jface/resource/JFaceResources.java
* obtained from
	 * <code>ResourceBundle.getBundle("org.eclipse.jface.jface_nls")</code>.
	 * <p>
	 * Note that several static convenience methods are also provided on this
	 * class for directly accessing resources in this bundle.
	 * </p>
	 * 
	 * @return the resource bundle
	 */
	public static ResourceBundle getBundle() {
		return bundle;
	}
	/**
	 * Returns the color registry for JFace itself.
	 * <p>
	 * 
	 * @return the <code>ColorRegistry</code>.
	 * @since 3.0
	 */
	public static ColorRegistry getColorRegistry() {
		if (colorRegistry == null) {
			colorRegistry = new ColorRegistry();
		}
		return colorRegistry;
	}
	/**
	 * Returns the global resource manager for the given display
	 * 
	 * @since 3.1
	 *