Add DM screenshots and lightdm slick-greeter config

- Wire sddm, lightdm, lxdm, greetd, ly screenshots into packagechooser_dm.conf
- Add new antergos-lightdm-config package (lightdm.conf + slick-greeter.conf)
- LightDM netinstall now includes lightdm-slick-greeter and antergos-lightdm-config

packages/antergos-lightdm-config/PKGBUILD

@@ -0,0 +1,21 @@
+# Maintainer: Celestia Ludenberg <ash8820@proton.me>
+
+pkgname=antergos-lightdm-config
+pkgver=1
+pkgrel=1
+pkgdesc="Antergos NeXT LightDM configuration (slick-greeter)"
+arch=('any')
+url="https://github.com/Antergos-NeXT/antergos-packages"
+license=('GPL3')
+depends=('lightdm' 'lightdm-slick-greeter' 'antergos-wallpapers')
+source=(
+  "lightdm.conf"
+  "slick-greeter.conf"
+)
+sha256sums=('SKIP' 'SKIP')
+
+package() {
+  install -dm755 "${pkgdir}/etc/lightdm"
+  install -m644 "${srcdir}/lightdm.conf" "${pkgdir}/etc/lightdm/lightdm.conf"
+  install -m644 "${srcdir}/slick-greeter.conf" "${pkgdir}/etc/lightdm/slick-greeter.conf"
+}

packages/antergos-lightdm-config/lightdm.conf

@@ -0,0 +1,9 @@
+[LightDM]
+logind-check-graphical=true
+log-directory=/var/log/lightdm
+run-directory=/run/lightdm
+
+[Seat:*]
+greeter-session=lightdm-slick-greeter
+user-session=default
+session-wrapper=/etc/lightdm/Xsession

packages/antergos-lightdm-config/slick-greeter.conf

@@ -0,0 +1,12 @@
+[Greeter]
+background=/usr/share/backgrounds/antergos/antergos-wallpaper.png
+background-color=#1E3A5F
+draw-user-backgrounds=false
+draw-grid=true
+theme-name=Adwaita
+icon-theme-name=Adwaita
+font-name=Noto Sans 10.5
+show-clock=true
+show-hostname=true
+show-power=true
+enable-hidpi=auto