* 'help-messages' -- array of message keys/objects. As above, each item can
* be an array of msg key and then parameters.
* Overwrites 'help'.
+ * 'help-inline' -- Whether help text (defined using options above) will be shown
+ * inline after the input field, rather than in a popup.
+ * Defaults to true. Only used by OOUI form fields.
* 'notice' -- message text for a message to use as a notice in the field.
* Currently used by OOUI form fields only.
* 'notice-messages' -- array of message keys/objects to use for notice.