set SO desktop wallpaper for iso install

setup/so-functions

@@ -2302,6 +2302,15 @@ set_default_log_size() {
 	log_size_limit=$( echo "$disk_size_gb" "$percentage" | awk '{printf("%.0f", $1 * ($2/100))}')
 }
 
+set_desktop_background() {
+
+	logCmd "mkdir /usr/local/share/backgrounds"
+	logCmd "cp ../salt/desktop/files/so-wallpaper.jpg /usr/local/share/backgrounds/so-wallpaper.jpg"
+	logCmd "cp ../salt/desktop/files/00-background /etc/dconf/db/local.d/00-background"
+	logCmd "dconf update"
+
+}
+
 set_hostname() {
 
 	logCmd "hostnamectl set-hostname --static $HOSTNAME"

setup/so-setup

@@ -341,6 +341,8 @@ if [[ $is_desktop ]]; then
 			securityonion_repo
 			info "Enabling graphical interface and setting it to load at boot"
 			systemctl set-default graphical.target
+			info "Setting desktop background"
+			set_desktop_background
 			echo "Desktop Install Complete!"
 			echo ""
 			echo "Please reboot to start graphical interface."