Right now to get the html:messages or html:errors tags to display "global"
messages, one must either display all of the messages or know the String literal
Struts uses to represent the "global" message scope. Instead, there should be
an attribute on each of these tags such as "onlyGlobal" which encapsulates
knowledge of the literal and makes it easier to show those.
About the only question is "what is the best attribute name?"
This would be a very easy patch to create for someone who wants to volunteer a
little time to helping improve Struts.