A solution could be listing all applications which should be shown by gnome-app-install. An another one (which should be better) could be creating a metapackage (u|go|ku|xu)ubuntu-desktop-all (or something similar) which depends on all optional packages.
A solution could be listing all applications which should be shown by gnome-app-install. An another one (which should be better) could be creating a metapackage (u|go|ku| xu)ubuntu- desktop- all (or something similar) which depends on all optional packages.