add blog, use url.getPreviousPageArg instead of duplicating that function here, start to lay out nav helper method
add blog, use url.getPreviousPageArg instead of duplicating that function here, start to lay out nav helper method

DemocracyLab/CivicTechExchange,DemocracyLab/CivicTechExchange,DemocracyLab/CivicTechExchange,DemocracyLab/CivicTechExchange