Much more implementation of CANDataGrid for CAN-FD. More or less works

now for both changed bit and signal views. There are still some
graphical tweaks to do. Probably doesn't quite work in fuzzing window
just yet.

re/newgraphdialog.h

@@ -27,7 +27,7 @@ private slots:
     void fillSwatchClick();
     void loadMessages();
     void loadSignals(int idx);
-    void bitfieldClicked(int,int);
+    void bitfieldClicked(int);
     void handleDataLenUpdate();
     void drawBitfield();
     void copySignalToParamsUI();