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/dialogs/PopupDialog.java
*/
	private ToolBar toolBar = null;
	/**
	 * The dialog's menu manager.
	 */
	private MenuManager menuManager = null;
	/**
	 * The control representing the main dialog area.
	 */
	private Control dialogArea;
	/**
	 * Labels that contain title and info text. Cached so they can be updated
	 * dynamically if possible.
	 */
	private Label titleLabel, infoLabel;
	/**
	 * Separator controls. Cached so they can be excluded from color changes.
	 */
	private Control titleSeparator, infoSeparator;
	/**
	 * The images for the dialog menu.
	 */
	private Image menuImage, disabledMenuImage = null;
	/**
	 * Font to be used for the info area text. Computed based on the dialog's
	 * font.
	 */
	private Font infoFont;
	
	/**