Beta v7.57.2269 changes:
1.Item 36, https://forums.mirc.com/ubbthreads.php/topics/266054
2.Item 37, https://forums.mirc.com/ubbthreads.php/topics/266138
3.Item 38, added.
4.Item 39, fixed.
5.Item 40, https://forums.mirc.com/ubbthreads.php/topics/264540
This change affects $comchan(), if isop/isvoice/ishelp/isowner, and
the channel Command Editbox handling of modes.
36.Fixed /window -r not restoring a hidden non-min/max window.
37.Changed $ctime() to return $null for invalid input and to handle
commas as separators.
38.Added support for IRCv3 message-tags token and msgid feature.
39.Fixed $N parameter bug that caused inconsistent handling of text
appended to the $N parameter, such as text that contained numbers
40.Fixed handling of channel nickname mode 'q' in some contexts.