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
*/
    protected void showErrorMessage(String msg) {
        if (page != null)
            page.setErrorMessage(msg);
    }
    /**
     * Shows the given message in the page for this
     * field editor if it has one.
     *
     * @param msg the message
     */
    protected void showMessage(String msg) {
        if (page != null)
            page.setErrorMessage(msg);
    }
    /**
     * Stores this field editor's value back into the preference store.
     */
    public void store() {
        if (preferenceStore == null)
            return;
        if (isDefaultPresented) {
            preferenceStore.setToDefault(preferenceName);
        } else {
            doStore();
        }
    }
    /**
     * Set the GridData on button to be one that is spaced for the
     * current font.