Add support to hide unlisted and private emotes from showing up

[VulpesHD]

trafficstars

I would like an option to disable unlisted and private 7TV emotes from showing up in the overlay. (Since they are mostly nsfw, they could get the streamer in trouble when they show up in the overlay on stream)

[IS2511]

I've put this off for a long time because the EventAPI implementation on my end was pretty bad. I've reworked it a while ago already and just haven't gotten to this. My bad.