Added relay actions and relay via menu. Removed retransmit and alert actions as they are superseded by relay/reply dialog

mainwindow.h

@@ -140,6 +140,7 @@ public slots:
   void writeNoticeTextToUI(QDateTime date, QString text);
   int writeMessageTextToUI(QDateTime date, QString text, int freq, bool bold, int block=-1);
   bool isMessageQueuedForTransmit();
+  void prependMessageText(QString text);
   void addMessageText(QString text, bool clear=false, bool selectFirstPlaceholder=false);
   void enqueueMessage(int priority, QString message, int freq, Callback c);
   void resetMessage();
@@ -269,6 +270,7 @@ private slots:
   void buildCallActivitySortByMenu(QMenu * menu);
   void buildQueryMenu(QMenu *, QString callsign);
   void buildRelayMenu(QMenu *menu);
+  QAction* buildRelayAction(QString call);
   void buildEditMenu(QMenu *, QTextEdit *);
   void on_queryButton_pressed();
   void on_macrosMacroButton_pressed();