Merge branch 'mcatanzaro/#3509' into 'master'
authorMatthias Clasen <mclasen@redhat.com>
Tue, 29 Dec 2020 17:47:01 +0000 (17:47 +0000)
committerMatthias Clasen <mclasen@redhat.com>
Tue, 29 Dec 2020 17:47:01 +0000 (17:47 +0000)
message dialog: use title style only if there is secondary text

Closes #3509

See merge request GNOME/gtk!3015


Trivial merge