LPS-42815

Hey @natecavanaugh,

Attached is an update for http://issues.liferay.com/browse/LPS-42815.

NOTE: This is really only used in portlet journal, but we have this style for ```.alert``` and ```.portlet-msg-error``` is extending the alert class, so to keep things consistent this makes the most sense.

Please let me know if you have any questions.  Thanks!