Topic-wide cherry-pick fails to add (cherry-picked from <sha1>) line

The new Gerrit version, when asking to cherry-pick a change which has a topic associated with it, asks whether I want to cherry-pick that one change, or the whole topic. Brave as I am, I chose "whole topic", and after some checking and unchecking of changes in the set back and forth, Gerrit allowed me to start the mass cherry-pick of a subset of topic:qAsConst to 6.4.

Result: https://codereview.qt-project.org/q/topic:cherrypick-qAsConst-5cyfqnu6xr

The results get -2'ed by the sanity bot, though, because they miss the (cherry-picked from XXXX) lines. This isn't something one can fix with a quick edit or a commit message, making the whole function rather useless.

Either fix the function to do proper cherry-pick -x's, or disable the functionality.