Editorial policy change: I've decided that it's better to use \q

Editorial policy change: I've decided that it's better to use \q
than \e when describing button names and menu items: the "Foo"
button rather than the _Foo_ button. Certainly consistent use of
either is better than the mixed use of both we had before :-)

git-svn-id: svn://svn.tartarus.org/sgt/putty@1420 cda61777-01e9-0310-a592-d414129be87e