RFE: Ability for h:messages to display a single custom message whenever the component has received any faces message.

In OmniFaces you can use h:messages to display a single message at the top of the screen such as "There are validation errors. Please fix them.", and then display component specific messages beside the components. They have added a "for" attribute to h:messages that points to the form component, and a "message" for the message to display. I will attach a screenshot.

[http://showcase.omnifaces.org/components/messages](http://showcase.omnifaces.org/components/messages)

I've had customers ask me to do this very thing in our production applications.

Start by reviewing the existing h:messages behavior and the linked OmniFaces messages example. Determine how a single custom message should be triggered when any Faces message exists, while component-specific messages remain available. Done means the proposed behavior is implemented and covered by appropriate tests.

Written by the indexing model from the issue text.