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/preference/FieldEditor.java
* @return the symbolic font name
     */
    public String getFieldEditorFontName() {
        return JFaceResources.DIALOG_FONT;
    }
    /**
     * Returns the label control. 
     *
     * @return the label control, or <code>null</code>
     *  if no label control has been created
     */
    protected Label getLabelControl() {
        return label;
    }
    /**
     * Returns this field editor's label component.
     * <p>
     * The label is created if it does not already exist
     * </p>
     *
     * @param parent the parent
     * @return the label control
     */
    public Label getLabelControl(Composite parent) {
        if (label == null) {
            label = new Label(parent, SWT.LEFT);
            label.setFont(parent.getFont());
            String text = getLabelText();
            if (text != null)
                label.setText(text);