Add XFCE theme configuration

install/11-theme.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+set -e
+
+echo "==> Konfiguriere XFCE..."
+
+xfconf-query -c xsettings -p /Net/ThemeName -s "Arc-Dark" || true
+xfconf-query -c xsettings -p /Net/IconThemeName -s "Papirus-Dark" || true
+xfconf-query -c xfwm4 -p /general/theme -s "Arc-Dark" || true
+
+echo "==> Theme eingerichtet."