Merge branch 'fix/wm_class' into 'master'
authorMatthias Clasen <mclasen@redhat.com>
Fri, 30 Jul 2021 23:25:08 +0000 (23:25 +0000)
committerMatthias Clasen <mclasen@redhat.com>
Fri, 30 Jul 2021 23:25:08 +0000 (23:25 +0000)
x11: set a default value for program_class

Closes #4138

See merge request GNOME/gtk!3806


Trivial merge