Fixes for many issues in flowview, graphing window, and frame playback.

In FlowView:
- Drastically improved functionality of live mode. It actually works now
- Fixed several crash bugs
- Program didn't used to pick up new frames properly. This is now corrected.

In Graphing window:
- Fixed dynamic updates to work properly even under heavy bus loads

In frame playback:
- Fixed a bug where single stepping through frames didn't send them over canbus

flowviewwindow.h

@@ -55,6 +55,8 @@ private:
     bool playbackForward;
     static const QColor graphColors[8];
     bool secondsMode;
+    QVector<double> x[8], y[8];
+    QCPGraph *graphRef[8];
 
     void refreshIDList();
     void updateFrameLabel();