For the new icon showing that a feature/chain is linked icon, can you find another icon (instead of a lock). I'm guessing you didn't want to you use a chain b/c chains are a different concept. I still think the font-awesome link icon would be fine (yes, it looks like a chain). How about the left or right arrow?
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| I need it... | Week |
How about fa-arrow-circle-o-left?