Bug 63159 [Progress] Progress dialog "Run in Background" button does not resize with larger font
If you set the dialog font to something large, the "Run in background" button does not correctly resize.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
* @return the number of pixels
	 * @since 2.0
	 */
	public static int convertHeightInCharsToPixels(FontMetrics fontMetrics,
			int chars) {
		return fontMetrics.getHeight() * chars;
	}
	/**
	 * Returns the number of pixels corresponding to the given number of
	 * horizontal dialog units.
	 * <p>
	 * The required <code>FontMetrics</code> parameter may be created in the
	 * following way: <code>
	 * 	GC gc = new GC(control);
	 *	gc.setFont(control.getFont());
	 *	fontMetrics = gc.getFontMetrics();
	 *	gc.dispose();
	 * </code>
	 * </p>
	 * 
	 * @param fontMetrics
	 *            used in performing the conversion
	 * @param dlus
	 *            the number of horizontal dialog units
	 * @return the number of pixels
	 * @since 2.0
	 */
	public static int convertHorizontalDLUsToPixels(FontMetrics fontMetrics,
			int dlus) {