Move some gnome@ ports to desktop@

[tcberner]

Summary

Due to gnome@ being afk for the moment, I would like to transfer some of the gnome@ ports to the desktop@ umbrella.

The list of ports has been generated via

> cd /ports/svn/x11/kde5 && make all-depends-list | xargs grep -rl 'MAINTAINER.*[e-mail]' | cut -d / -f 5,6 | sort -u
accessibility/at-spi2-atk
accessibility/at-spi2-core
accessibility/atk
audio/libcanberra
audio/libcanberra-gtk3
audio/pulseaudio
converters/fribidi
converters/libiconv
devel/dbus-glib
devel/dconf
devel/desktop-file-utils
devel/gconf2
devel/glib20
devel/gobject-introspection
devel/gsettings-desktop-schemas
devel/json-glib
devel/libdaemon
devel/libgsf
devel/libical
devel/libIDL
devel/libnotify
devel/libsoup
devel/meson
devel/ORBit2
devel/pygobject3-common
graphics/cairo
graphics/gdk-pixbuf2
graphics/gtk-update-icon-cache
graphics/librsvg2
graphics/py-cairo
lang/vala
misc/hicolor-icon-theme
net/avahi-app
net/avahi-libdns
net/glib-networking
print/harfbuzz
print/libspectre
security/libpwquality
sysutils/consolekit2
sysutils/gnome_subr
textproc/gtk-doc
textproc/intltool
textproc/libcroco
x11-themes/adwaita-icon-theme
x11-toolkits/gtk20
x11-toolkits/gtk30
x11-toolkits/pango

Note, I'm not quite sure whether desktop@ should take all of them, so I'm open for suggestion on which to remove from the list.

[mat]

Well, the bureaucrat in me thinks "open a PR, wait 14 days, commit". ;-)

[bapt]

except I already proposed to do that a couple of month ago, so the 14 day are past ;)

[val_packett.cool]

Wow, what is devel/meson of all things doing in gnome? (and devel/cmake, devel/ninja in kde, for that matter)

Maybe x11-themes/adwaita-icon-theme should still be in gnome, but I like the list overall.

[val_packett.cool]

Oh, also, x11-toolkits/libhandy should be added to the list.

[tcberner]

In D26362#586426, @greg_unrelenting.technology wrote:

Wow, what is devel/meson of all things doing in gnome? (and devel/cmake, devel/ninja in kde, for that matter)

Well, I think we as kde@ do a quite good job at keeping cmake and ninja going at the moment ... :)

[tcberner]

In D26362#586778, @greg_unrelenting.technology wrote:

Oh, also, x11-toolkits/libhandy should be added to the list.

This one seems a bit too unrelated at the moment for me.