paraFoam: Render on refresh

The "Refresh Times" button now triggers a re-render of the visualisation
as well as scanning for new times and fields. This prevents old
overwritten data from remaining on screen despite everything else having
been updated.

applications/utilities/postProcessing/graphics/PVReaders/PVFoamReader/PVFoamReader/vtkPVFoamReader.cxx

@@ -352,6 +352,8 @@ int vtkPVFoamReader::RequestData
 void vtkPVFoamReader::SetRefresh()
 {
     Modified();
+
+    pqApplicationCore::instance()->render();
 }