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/DialogPage.java
*            the id of the widget for which hover help is requested
     * @return the tool tip text, or <code>null</code> if none
     * @deprecated 
     */
    protected final String getToolTipText(int widgetId) {
        
        return null;
    }
    /**
     * Initializes the computation of horizontal and vertical dialog units based
     * on the size of current font.
     * <p>
     * This method must be called before any of the dialog unit based conversion
     * methods are called.
     * </p>
     * 
     * @param testControl
     *            a control from which to obtain the current font
     */
    protected void initializeDialogUnits(Control testControl) {
        
        GC gc = new GC(testControl);
        gc.setFont(JFaceResources.getDialogFont());
        fontMetrics = gc.getFontMetrics();
        gc.dispose();
    }
    /**
     * Sets the <code>GridData</code> on the specified button to be one that
     * is spaced for the current dialog page units. The method
     * <code>initializeDialogUnits</code> must be called once before calling