This sounds like an upstream missing feature / bug. Would you mind filing it at https://bugzilla.mozilla.org/enter_bug.cgi#h=dupes%7CThunderbird, and sharing the link here?
This sounds like an upstream missing feature / bug. Would you mind filing it at https:/ /bugzilla. mozilla. org/enter_ bug.cgi# h=dupes% 7CThunderbird, and sharing the link here?