Description: Use lxqt-sudo instead of pkexec as switch user command. 
Author: Walter Lapchynski <wxl@ubuntu.com> 
--- a/src/etc/xdg/xdg-Lubuntu/pcmanfm-qt/lxqt/settings.conf
+++ b/src/etc/xdg/xdg-Lubuntu/pcmanfm-qt/lxqt/settings.conf
@@ -1,6 +1,6 @@
 [System]
 IconThemeName=Lubuntu
-SuCommand=pkexec %s
+SuCommand=lxqt-sudo %s
 Terminal=qterminal
 TerminalDirCommand=qterminal
 TerminalExecCommand=qterminal -e %s