The new SHA mysteriously caused more than 300 extra warnings in the
app log. It was caused by a code change in Kirigami. The way to
suppress it is, in hindsight, after some hours of searching, trivial.
A Kirigami.BasicListItem shall have an icon defined. And as we do
not care about any icon here, just define it empty.
Signed-off-by: Jan Mulder <jlmulder@xs4all.nl>