v3.8.1 - Fix Docker systemd detection. Improve -fp CLI output. Improve listener startup behaviour.
-v3.8.1.
-Improve the -fp CLI argument output to make bubblewrap / imagemagick / OpenSCAD output consistent.
-Previously we were using negative language for positive operation results, which was confusing.
-Improve the way systemd detection is performed.
-Improve listener startup routine.
-Improve GUI error handling.
-Added iframe file list to convertGui2.php on Default GUI.
-This GUI has auto file list reload now without reloading the whole page.