Re-enable search in NSFW channels

You used to be able to search posts in NSFW channels. This should be reenabled, as it's near impossible to find posts in history. 

I understand if it's done this way so that someone searching in a server in public won't get NSFW results, but it doesn't even work if you explicitly search inside of a NSFW channel anymore. 

If it's done this way to protect someone posting intimate photos of themselves by not allowing someone to quickly get all material on a certain person, this wouldn't be effective protection, as the person could not easily find their own posts to remove them, if they wanted to.