[FEATURE REQUEST] IN COLLECTION feature on sub/bundle/etc pages

[TheW0LVERIN3]

Current Behavior (if any)

As I said on discord:

It seems that the itad collection as feature doesn't show up here: https://store.steampowered.com/sub/31292/
Presumably because it's a bundle, but since it has an itad page(that AS links to) it should probably appear when it's in my itad collection.

I got this reply:

That feature has never worked on sub/bundle pages before, possibly due to how the API works, but with the new ITAD it might be doable. Can you log an issue on GitHub so we can track it?

Desired Behavior

It would be nice if wherever there is a link to an itad page, there is also that "in itad collection" thing, including on bundle,etc pages.
An example of the in collection thing I'm referring to:

Motivation / Use Case for Changing the Behavior

Right now it's confusing since the pricing pointing to an itad page shows up but it doesn't show you it's in your collection. I use the itad collection sync feature a lot since I use itad to keep track of all the games I own and where I own them. I tend to sometimes use the steam page with AS to check whether I already own something so this would be a nice improvement.

Image for reference showing that the in collection thing doesn't show up unlike regular store pages, but the itad pricing thing does show up: