Add xfce-polkit to i3-Spin

This fix https://bugzilla.redhat.com/show_bug.cgi?id=2240823 and https://pagure.io/i3-sig/Fedora-i3-Spin/issue/68

fedora-i3-common.ks

@@ -24,6 +24,8 @@ gnome-keyring-pam
 wget
 # Better more popular browser
 system-config-printer
+# Install XFCE polkit
+xfce-polkit
 
 # save some space
 -autofs

fedora-live-i3.ks

@@ -23,6 +23,15 @@ PREFERRED=/usr/bin/i3
 DISPLAYMANAGER=/usr/sbin/lightdm
 EOF
 
+
+# Fix https://bugzilla.redhat.com/show_bug.cgi?id=2240823
+cat > /etc/xdg/autostart/xfce-polkit.desktop <<EOF
+[Desktop Entry]
+Type=Application
+Name=xfce-polkit
+Exec=/usr/libexec/xfce-polkit
+EOF
+
 # set livesys session type
 sed -i 's/^livesys_session=.*/livesys_session="i3"/' /etc/sysconfig/livesys