fixed a bug related disabling data(theory) context menu in data_panel
fixed a bug related disabling data(theory) context menu in data_panel

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