db to config file

moved quite a bit of config options to config file from db, not much left in the site configuration page now

follow the commits to see the work

NOTE: no liquibase migrations provided as we're getting rid of the db anyway, this will let us roll back in case we need to
Maybe `portalConfig`? I'd like to know what `appConfig` is really used for. I know it's passed to a couple of constructors but I don't think FeatureInfoPopup uses it.