User's Guide issues

[mkoskim]

It is quite nice, that the User's Guide is also a tutorial. Yes, but...

It is not that good idea, that pressing Help button (?) will replace the existing buffer by User's Guide. Without tabbed editing, we can't help it, but at least it would be good that before replacing the buffer, we'd warn about unsaved file.

Moreover, User's Guide could be divided to three parts: (1) Quick Reference about markup and hotkeys, (2) Tutorial, and (3) User's Guide itself.

And even more, the User's Guide could be e.g. GitHub Wiki page, or maybe a Googledoc, or something, as User's Guide most probably need pictures!