Bug 184597 [Contributions] ActionContributionItem should show accelerator text even if accelerator cannot be parsed
bundles/org.eclipse.jface/src/org/eclipse/jface/action/ActionContributionItem.java
* 
	 * @param forceImage
	 *            <code>true</code> if some form of image is compulsory, and
	 *            <code>false</code> if it is acceptable for this item to have
	 *            no image
	 * @return <code>true</code> if there are images for this action,
	 *         <code>false</code> if not
	 */
	private boolean updateImages(boolean forceImage) {
		ResourceManager parentResourceManager = JFaceResources.getResources();
		if (widget instanceof ToolItem) {
			if (USE_COLOR_ICONS) {
				ImageDescriptor image = action.getHoverImageDescriptor();
				if (image == null) {
					image = action.getImageDescriptor();
				}
				ImageDescriptor disabledImage = action
						.getDisabledImageDescriptor();
				
				if (image == null && forceImage) {
					image = ImageDescriptor.getMissingImageDescriptor();
				}
				LocalResourceManager localManager = new LocalResourceManager(
						parentResourceManager);
				
				
				((ToolItem) widget)
						.setDisabledImage(disabledImage == null ? null
								: localManager
										.createImageWithDefault(disabledImage));