Disables the rack and fixes a couple of other things

Needed to redo a bit of code so that effects would work
without the rack in the middle.  I wanted to disconnect
it completely as I'm not sure it something that will be
kept around.

During realtime preview, effects will be applied in the
order their dialogs were opened...hmmm...what happens
if they don't have a dialog???  I look into that.

Fixed the focus target for windows when cycling among
active windows as suggested by David B.

Fixed plugin registration if the plugins were located
in the "Plug-ins" folder.  I believe this problem may
have played a role in the duplicate menu items.



git-svn-id: http://audacity.googlecode.com/svn/audacity-src/trunk@13653 47890b92-0858-11df-a26f-8b716316a5bc
Fix Mac build after adding Objective-c source

I'd named it ".m" and a simply rename to ".mm" to make it
an Objective-C++ file fixes the build problem...go figure.



git-svn-id: http://audacity.googlecode.com/svn/audacity-src/trunk@13654 47890b92-0858-11df-a26f-8b716316a5bc
Follow up to r13654...actually commited the renamed file.



git-svn-id: http://audacity.googlecode.com/svn/audacity-src/trunk@13655 47890b92-0858-11df-a26f-8b716316a5bc