[Bug] Small nitpick: Tasks in Favourite Tasks should have the 'unfavorite' button a solid star.

Like the title says, this is a super small nitpick, but the star should show filled as it is currently favorited (like in other UI). Giving the user the feedback that it is indeed an 'unfavorite' icon (as it is the opposite of the favorite icon).

Start by locating the Favourite Tasks UI and the star icon used for its task actions. Confirm how the favorite and unfavorite states are represented elsewhere in the UI, then verify that a favorited task shows a solid star and that the control still unfavorites it.

Written by the indexing model from the issue text.