new function created to parse DWP columns (must be numeric and between 0 and 1), which is used to tidy the set of columns available, and now if there's only one acceptable dwp column, it's selected as the default, otherwise there's no default selection
new function created to parse DWP columns (must be numeric and between 0 and 1), which is used to tidy the set of columns available, and now if there's only one acceptable dwp column, it's selected as the default, otherwise there's no default selection