LPS-37667 - Error messages not visible in Asset Tags Admin

Hey @Robert-Frampton,

Attached is an update for http://issues.liferay.com/browse/LPS-37667.  Can we make the following changes to this update?

1) The id on the container. We shouldn't use an unnamespaced id, but also, in this case, we're adding multiple elements with the same id to the page (for instance, add one tag, then edit a different one, and run A.all('#tagMessagesEdit') and you'll see that there are now 2 divs with the same id)

2) We can't reliably do: removeClass('class1 class2') because the way removeClass works is that it will look for the string passed in, so if the class had somehow become alert-error alert then removeClass would no longer work. In this case, we're going to need alert on the div no matter what, so we should only remove the alert-error or alert-success classes.

Please let me know if you have any questions.  Thanks!

Reference: https://github.com/natecavanaugh/liferay-portal/pull/1382