Making the save icon act similar to the follow icon

[Aces-and-Jacks]

I noticed the feature to save projects to a list was added recently which would be incredible for people who just want to keep track of certain mods but not want to follow their updates.

However one thing that I think would improve it visually for me is if the icon acted the same way the follow icon does. When you follow a project the heart icon gets filled in but if you save a project the bookmark icon doesn't get filled in. Even if you add it to multiple lists it'd help so you know that it got added to a list and didn't just forget to.

[Aces-and-Jacks]