fix sourcIntensityReport samplingMethod field by add the watching.
fix sourcIntensityReport samplingMethod field by add the watching.

mkeilman/sirepo,mkeilman/sirepo,radiasoft/sirepo,mkeilman/sirepo,radiasoft/sirepo,radiasoft/sirepo,radiasoft/sirepo,radiasoft/sirepo,mkeilman/sirepo