Add UDP message to set temporary Maidenhead locator

When "Auto  Grid" is  checked in  "Settings->General" UDP  messages of
type "Location" will update a temporary  DE grid square. The intent is
to  allow  an external  application  joining  the WSJT-X  UDP  message
protocol to dynamically update the DE grid during mobile operation.

This change also tidies up  some outstanding issues around logging the
operator call.

This change  adds a new UDP  message "Logged ADIF" that  is emitted in
parallel with  "QSO Logged"  messages. The new  message is  valid ADIF
file format  and contains the  logged QSO  fields. The intent  is that
basic  UDP server  applications  might already  have  ADIF log  record
capture capabilities and could use  this message to feed existing ADIF
parsing routines to log QSOs. All that should be needed is to identify
this message type and the single field is ADIF compatible ASCII.

Thanks  to  Brian,   N9ADG,  for  the  patches  that   lead  to  these
enhancements.

git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@8454 ab8295b8-cf94-4d9e-aec4-7959e3be5d79

UDPExamples/ClientWidget.hpp

@@ -43,6 +43,7 @@ public:
   Q_SIGNAL void do_reply (QModelIndex const&, quint8 modifier);
   Q_SIGNAL void do_halt_tx (QString const& id, bool auto_only);
   Q_SIGNAL void do_free_text (QString const& id, QString const& text, bool);
+  Q_SIGNAL void location (QString const &id, QString const &text);
 
 private:
   QString id_;
@@ -69,9 +70,11 @@ private:
   QTableView * decodes_table_view_;
   QTableView * beacons_table_view_;
   QLineEdit * message_line_edit_;
+  QLineEdit * grid_line_edit_;
   QStackedLayout * decodes_stack_;
   QAbstractButton * auto_off_button_;
   QAbstractButton * halt_tx_button_;
+  QLabel * de_label_;
   QLabel * mode_label_;
   bool fast_mode_;
   QLabel * frequency_label_;