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
* has been called.
	 * </p>
	 * <p>
	 * Clients may call this framework method, but should not override it.
	 * </p>
	 * 
	 * @param dlus
	 *            the number of horizontal dialog units
	 * @return the number of pixels
	 */
	protected int convertHorizontalDLUsToPixels(int dlus) {
		
		if (fontMetrics == null)
			return 0;
		return convertHorizontalDLUsToPixels(fontMetrics, dlus);
	}
	/**
	 * Returns the number of pixels corresponding to the given number of
	 * vertical dialog units.
	 * <p>
	 * This method may only be called after <code>initializeDialogUnits</code>
	 * has been called.
	 * </p>
	 * <p>
	 * Clients may call this framework method, but should not override it.
	 * </p>
	 * 
	 * @param dlus
	 *            the number of vertical dialog units
	 * @return the number of pixels