Please correct me if i'm wrong but isit blacklist & whitelist the same things????
blacklist is use to disable force rotation in same apps/program while whitelist is use to enable force rotation in same app/program....
if you puts some apps/program likes conversations in blacklist then it wont rotate even you enable force rotations right??? so if we dont puts conversations in whitelist then it wont rotate also right???
so why need whitelist when blacklist can do the same thing on the opposite way???

what ever apps/program you put in blacklist will not rotate so anything that is not listed in the blacklist will be force rotate...the same thing with whitelist...puts everything you want to force rotate & left the rest (as you listed in blacklist) & the result will be the same....