bug#32799: 26; `(mouse-)tear-off-window'

[Drew Adams]

In Emacs 24.4 apparently (though there was nothing in NEWS about it)
command `mouse-tear-off-window' was renamed to `tear-off-window'.

Why?  There are lots of commands whose prefix is `mouse-' and that can
be bound only to a mouse event - like this one.

Please either: (1) make it possible to bind this command also or
alternatively to a keyboard key sequence or (2) rename this mouse-only
command back to `mouse-tear-off-window' and create a new command
`tear-off-window' that can be bound to keyboard keys.

In GNU Emacs 26.1 (build 1, x86_64-w64-mingw32)
 of 2018-05-30
Repository revision: 07f8f9bc5a51f5aa94eb099f3e15fbe0c20ea1ea
Windowing system distributor `Microsoft Corp.', version 10.0.16299
Configured using:
 `configure --without-dbus --host=x86_64-w64-mingw32
 --without-compress-install 'CFLAGS=-O2 -static -g3''