Track rig mode

I can't remember exactly why mode tracking was disabled but it doesn't
seem to be necessary  to do so. I am expecting  some fallout from this
change, when I discover why it was  necessary to ignore the rig mode I
will find a better way to do this.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@7548 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

TransceiverBase.cpp

@@ -209,6 +209,7 @@ void TransceiverBase::update_split (bool state)
 void TransceiverBase::update_mode (MODE m)
 {
   actual_.mode (m);
+  requested_.mode (m);    // track rig changes
 }
 
 void TransceiverBase::update_PTT (bool state)