Adding journalctl Log sources to Webmin System Log Viewer through the gui

After Virtualmin installation by the script, on a freshly installed Debian 12 system, Webmin System Log Viewer displays 7 “journalctl like” Log destinations (such as "Output from journalctl --lines 100 -x "). It would be nice to have the ability to add new ones through the gui (for instance, “journalctl -u postfix@-.service”).

Dupe of Add a "Output from journalctl…" in System Logs Viewer - #6 by Joe

No need for another topic about this.