thruActivated as a property of the Transport layer

src/MIDI.hpp

@@ -94,7 +94,7 @@ void MidiInterface<Transport, Settings, Platform>::begin(Channel inChannel)
     mMessage.length  = 0;
 
     mThruFilterMode = Thru::Full;
-    mThruActivated  = true;
+    mThruActivated  = mTransport.thruActivated;
 }
 
 // -----------------------------------------------------------------------------

src/serialMIDI.h

@@ -51,7 +51,9 @@ public:
 	};
 
 public:
-	void begin()
+    static const bool thruActivated = false;
+    
+    void begin()
 	{
         // Initialise the Serial port
         #if defined(AVR_CAKE)