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
*/
    public void setSize(Point uiSize) {
        Control control = getControl();
        if (control != null) {
            control.setSize(uiSize);
            size = uiSize;
        }
    }
    /**
     * The <code>PreferencePage</code> implementation of this <code>IDialogPage</code>
     * method extends the <code>DialogPage</code> implementation to update
     * the preference page container title. Subclasses may extend.
     */
    public void setTitle(String title) {
        super.setTitle(title);
        if (getContainer() != null)
            getContainer().updateTitle();
    }
    /**
     * Sets whether this page is valid.
     * The enable state of the container buttons and the
     * apply button is updated when a page's valid state 
     * changes.
     * <p>
     *
     * @param b the new valid state
     */
    public void setValid(boolean b) {
        boolean oldValue = isValid;
        isValid = b;