Update to V169 - Now compiles under QT 5.9 (LTS). Fixed some warnings,

switched to using system QTScintilla library on Linux. This prevents
you from needing to compile it yourself, added preliminary support for
three buses with a GVRET device (for Macchina M2 boards)

connections/canconnection.h

@@ -183,6 +183,7 @@ public slots:
     void debugInput(QByteArray bytes);
 
 protected:
+    int           mNumBuses; //protected to allow connected device to figure out how many buses are available
 
     //determine if the passed frame is part of a filter or not.
     void checkTargettedFrame(CANFrame &frame);
@@ -290,7 +291,6 @@ protected:
 
 private:
     LFQueue<CANFrame>   mQueue;
-    const int           mNumBuses;
     const QString       mPort;
     const CANCon::type  mType;
     bool                mIsCapSuspended;