Sorry, I didn't mean to come off as rude or anything, but I see no way to add more than one whitelisted (or adlist for that matter) domain at a time via the GUI. The scenario that I am having trouble with is this: I setup a new pihole instance and want to add my 200+ whitelisted domains. With the whitelist file gone, which we used to be able to simply manipulate with bash, I don't see a way to add these domains other than 1 by 1. A few friends and I have our whitelisted domains in a git repository and could simply pull them into our whitelist file via basic bash scripting.
I imagine this might be possible via interaction with the db, unfortunately my sql knowledge is pretty limited (am more of a infrastructure/syseng guy).