I think it would be good for the Scripts Editor to allow quick and direct access to the tabs with just one click, as mIRC itself already does through rclick on the toolbar.

My suggestion is:

We have a command /scriptseditor -r <N|filename> - which opens the script editor if it is not already open, and then makes the remote tab active and shows the Nth remote script file, aliases, Popups or the <filename > specified if this file is loaded, if N or filename is invalid, open script editor in remote tab with current remote script.

To complete a bit:

/scripteditor -r <N|filename> for remote tab showing the Nth script file or the <filename> script file (if loaded)
/scripteditor -a <N|filename> for aliases tab showing the Nth alias file or the <filename> alias file (if loaded)
/scripteditor -ps for the popups tab showing the status window popups
/scripteditor -pc for the popup tab showing the channel popups
/scripteditor -pq for the popup tab showing the query popups
/scripteditor -pn for the popup tab showing the nicklist popups
/scripteditor -pm for the popup tab showing menubar popups
/scripteditor -v for Variables tab
/scripteditor -u for the Users tab

Edit: a -gN switch to go to the Nth line in the editor would be great as well

I support this idea.