Another set of improvements in the Emacs manual

Another set of improvements in the Emacs manual

* doc/emacs/msdos-xtra.texi (MS-DOS Keyboard):
* doc/emacs/msdos.texi (Windows Keyboard):
* doc/emacs/mark.texi (Using Region):
* doc/emacs/frames.texi (Menu Mouse Clicks):
* doc/emacs/macos.texi (Mac / GNUstep Basics): Fix spelling of
keys.  Reported by Michael Albinus <michael.albinus@gmx.de> in
emacs-manual-bugs@gnu.org.

* doc/emacs/glossary.texi (Glossary): Document that "c.f." is a
misspelling.  Reported by Robert Pluim <rpluim@gmail.com>.
Various minor wording improvements.  Suggested by Toon Claes
<toon@iotcl.com> in emacs-manual-bugs@gnu.org.
More minor changes.  Suggested by Michael Albinus
<michael.albinus@gmx.de> in emacs-manual-bugs@gnu.org.

* doc/emacs/cmdargs.texi (Title X): Improve wording.

* doc/emacs/building.texi (Grep Searching, Compilation): Avoid
passive tense.

* doc/emacs/basic.texi (Moving Point): Move the description of the
bidi-related effects of the arrow keys from here ...
* doc/emacs/mule.texi (Bidirectional Editing): ... to here.
Explain the behavior of arrow keys between paragraphs.