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
* getting the specified background color, it may instead override
	 * <code>PopupDialog.getBackgroundColorExclusions</code>.
	 * 
	 * @param color
	 *            the color to use as the background color
	 * @param control
	 *            the control whose color is to be changed
	 * @see PopupDialog#getBackgroundColorExclusions()
	 */
	protected void applyBackgroundColor(Color color, Control control) {
		applyBackgroundColor(color, control, getBackgroundColorExclusions());
	}
	/**
	 * Return a list of controls which should never have their foreground color
	 * reset. Subclasses may extend this method (should always call
	 * <code>super.getForegroundColorExclusions</code> to aggregate the list.
	 * 
	 * 
	 * @return the List of controls
	 */
	protected List getForegroundColorExclusions() {
		List list = new ArrayList(3);
		if (infoLabel != null) {
			list.add(infoLabel);
		}
		if (titleSeparator != null) {
			list.add(titleSeparator);
		}
		if (infoSeparator != null) {
			list.add(infoSeparator);