+ * Additional recognized configuration parameters include:
+ * - flags: OOUI flags for the button, see OOUI\\FlaggedElement
+ * - buttonlabel-message: Message to use for the button display text, instead
+ * of the value from 'default'. Overrides 'buttonlabel' and 'buttonlabel-raw'.
+ * - buttonlabel: Text to display for the button display text, instead
+ * of the value from 'default'. Overrides 'buttonlabel-raw'.
+ * - buttonlabel-raw: HTMLto display for the button display text, instead
+ * of the value from 'default'.
+ *
+ * Note that the buttonlabel parameters are not supported on IE6 and IE7 due to
+ * bugs in those browsers. If detected, they will be served buttons using the
+ * value of 'default' as the button label.
+ *