Github user nickwallen commented on the issue:
https://github.com/apache/metron/pull/811
Thanks @justinleet . This is working well with @iraghumitra UI work in
#803.
The metalerts show-up in the left-side "Filters" panel, which provides a
decent short-cut to retrieve the metaalerts. For example, here I created 4
metaalerts. If I click on "metaalerts" on that left panel, it filters
everything down to metaalerts.

Filtering does nicely retrieve both alerts and metaalerts.

---