fixed the compute Pr from popup menu in plot panel
fixed the compute Pr from popup menu in plot panel

lewisodriscoll/sasview,lewisodriscoll/sasview,SasView/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,lewisodriscoll/sasview,SasView/sasview,SasView/sasview