Fixed several DBC related bugs, expanded support for FD frames in the

DBC editor windows. Should more or less function now even for FD frames.

dbc/dbcsignaleditor.h

@@ -26,7 +26,7 @@ signals:
     void updatedTreeInfo(DBC_SIGNAL *sig);
 
 private slots:
-    void bitfieldClicked(int x, int y);
+    void bitfieldClicked(int bit);
     void onValuesCellChanged(int row,int col);
     void onCustomMenuValues(QPoint);
     void deleteCurrentValue();