Bug 73027 [Dialogs] Buttons are too high
I20040831 Buttons are no longer oval but have a rounded rectangle shape (see first screenshot). The second screenshot shows how buttons using the small system font should look like.
bundles/org.eclipse.jface/src/org/eclipse/jface/dialogs/Dialog.java
* 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
     */
    protected int convertVerticalDLUsToPixels(int dlus) {