add function to return default config values for nav bar
add function to return default config values for nav bar

Signed-off-by: Adam Cox <707ea0bf03a27b65588fdaa75978c372c1033476@gmail.com>

archesproject/arches,cvast/arches,archesproject/arches,cvast/arches,archesproject/arches,cvast/arches,archesproject/arches,cvast/arches