Make config for logLevelMessagePrefix explicit
Make config for logLevelMessagePrefix explicit

Even though this is the default, having the prefixes listed will make
the code less magic, and more straightforward.

https://github.com/NatLibFi/loglevel-message-prefix#configuration

trotzig/import-js,Galooshi/import-js,trotzig/import-js,trotzig/import-js