Fix path to nav.html. Fix https://github.com/npct/pct-shiny/issues/701
Fix path to nav.html. Fix https://github.com/npct/pct-shiny/issues/701

npct/pct-shiny,npct/pct-shiny,npct/pct-shiny,npct/pct-shiny,npct/pct-shiny,npct/pct-shiny