Stops sixth sense from marking tied down ncps.

To be honest this is most likely a completely intended behavior so it isn't much of a fix,
however I don't see a reason for it to be like this and the outlines were genuinely bothering me for the longest time.

Credits:

Creazzz for Dominated Outlines (Converts & Civilians), whose code was used for checking if an npc has been tied down.

Blue archive player, who figured out how to make this while I was asleep, I did end up changing it quite a bit but he helped.