Much code cleanup: remove unised variables and code.

Include # channels in audio device offerings.
Start implementing "msgsent" correctly.  (Not finished!)
Include Date in UTC display.
Use the properly computer snrdb.


git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@2718 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

plotter.cpp

@@ -73,8 +73,6 @@ void CPlotter::resizeEvent(QResizeEvent* )                    //resizeEvent()
 
 void CPlotter::paintEvent(QPaintEvent *)                    // paintEvent()
 {
-  static int x00=-99;
-
   if(m_paintEventBusy) return;
   m_paintEventBusy=true;
   QPainter painter(this);