bug#9350: 23.3; File menu should contain "split window horizontally C-x 3"

[Stefan Monnier]

> I added an entry for C-x 3.  Please have a look.

I like the new wording and the new function, thanks.

> Note: Adding an entry for `split-window-sensibly' doesn't strike me as a
> good idea since that function is part of the buffer display routines and
> constrained by `split-height-threshold' and `split-width-threshold'.

Agreed.  If the user can choose "New window sensibly" he may as well
choose "new window below" or "new window on the right" depending on his
current preference.


        Stefan