demo: Add subpages to the preferences window

11 jobs for preferences-custom-page in 23 minutes and 1 second (queued for 1 second)
Status Name Job ID Coverage
  Build
passed api-visibility #828829

00:00:21

passed build-debian-clang #828831

00:04:00

passed build-debian-gcc #828830

00:03:44

passed build-fedora-gcc #828832

00:08:19

passed build-flatpak #828833
flatpak

00:03:28

passed build-flatpak-glade #828834
flatpak

00:08:41

 
  Test+Docs
passed build-gtkdoc #828835

00:02:14

passed unit-test #828836

00:02:20

44.2%
 
  Package
passed package-debian-buster #828837

00:04:21

 
  Test Package
passed autopkgtest-debian-buster-package #828838

00:07:36

passed lintian-debian-buster-package #828839

00:02:04