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/PreferencePage.java
* if the page is valid.
     */
    public boolean okToLeave() {
        return isValid();
    }
    /**
     * Performs special processing when this page's Apply button has been pressed.
     * <p>
     * This is a framework hook method for sublcasses to do special things when
     * the Apply button has been pressed.
     * The default implementation of this framework method simply calls
     * <code>performOk</code> to simulate the pressing of the page's OK button.
     * </p>
     * 
     * @see #performOk
     */
    protected void performApply() {
        performOk();
    }
    /**	
     * The preference page implementation of an <code>IPreferencePage</code>
     * method performs special processing when this page's Cancel button has
     * been pressed.
     * <p>
     * This is a framework hook method for sublcasses to do special things when
     * the Cancel button has been pressed. The default implementation of this
     * framework method does nothing and returns <code>true</code>.
     */
    public boolean performCancel() {
        return true;