Make sure get_pandas_dataframe() works with 1D mesh filter
Make sure get_pandas_dataframe() works with 1D mesh filter

johnnyliu27/openmc,smharper/openmc,paulromano/openmc,paulromano/openmc,amandalund/openmc,mit-crpg/openmc,walshjon/openmc,shikhar413/openmc,wbinventor/openmc,smharper/openmc,johnnyliu27/openmc,walshjon/openmc,mit-crpg/openmc,johnnyliu27/openmc,liangjg/openmc,smharper/openmc,smharper/openmc,paulromano/openmc,amandalund/openmc,walshjon/openmc,mit-crpg/openmc,shikhar413/openmc,mit-crpg/openmc,liangjg/openmc,liangjg/openmc,wbinventor/openmc,shikhar413/openmc,amandalund/openmc,walshjon/openmc,wbinventor/openmc,shikhar413/openmc,liangjg/openmc,wbinventor/openmc,johnnyliu27/openmc,paulromano/openmc,amandalund/openmc