Add a moveTo method to ItemTab, which enables panning and scrolling in all ItemTab windows, like GodleyTab/ PlotTab etc.

Author: highperformancecoder

model/itemTab.h

@@ -85,6 +85,12 @@ namespace minsky
     void mouseDown(float x, float y) override;
     void mouseUp(float x, float y) override;
     void mouseMove(float x, float y) override;    
+    void moveTo(float x, float y) override
+    {
+      offsx=x;
+      offsy=y;
+      requestRedraw();
+    }
     virtual ItemPtr itemAt(float x, float y);
     void displayDelayedTooltip(float x, float y);