Bug: search "All ponymail.a.o lists" does not show list ids if no search text provided

Recipe:
https://lists.apache.org/list.html?dev@ponymail.apache.org
Change search: All ... lists
Click search '>' button
Result:
Messages from all lists are shown, but the list ids are not present

However if something is typed in the search box first (e.g. 'a' or 'the') then the list ids are shown correctly.

Reproduce the issue at list.html using the dev@ponymail.apache.org URL, selecting “All ... lists” and submitting with an empty search box. Compare the result with searches containing “a” or “the”, then trace the frontend search handling for the empty-query case. Done means list ids appear when messages from all lists are shown without search text.

Written by the indexing model from the issue text.