Missing item+ shortcut in UserGuide

[Jean-Pierre Chrétien]

Hello,

At the beginning of section 2.1, "Save all" is missing in the description of the 
menu list for "File".

And the keyboard shortcut with "New from template..." is replaced by 
"undefined". The reason is that Ctrl-Shift-N which pointed to 
buffer-new-template with 2.3, now points to the new "dialog-show lyxfiles 
templates". Substituting the info inset externally solves this issue (I do not 
know how to edit an info inset inside LyX).

I will post an updated version later, I may find other typos while updating the 
French version of the manual.

-- 
Jean-Pierre