Allow the program to "send" frames even if no buses are configured.

These frames will show up in the main frame list and can be operated
on as if they came into the program. It is likely that only the
playback window will work for this special use. Other sending windows
are to follow.

connections/canconmanager.h

@@ -77,7 +77,9 @@ private:
     QElapsedTimer          mElapsedTimer;
     uint64_t               mTimestampBasis;
     uint32_t               mNumActiveBuses;
-    bool useSystemTime;
+    bool                   useSystemTime;
+    QVector<CANFrame>      buslessFrames;
+    QVector<CANFrame>      tempFrames;
 };
 
 #endif // CANCONNECTIONMODEL_H