updated Rmcdr-menus.txt for RcmdrMisc package. John

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rcmdr@517 edb9625f-4e0d-4859-8d74-9fd3b1da38cb
fixed spelling error in description file. John

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rcmdr@518 edb9625f-4e0d-4859-8d74-9fd3b1da38cb