I agree. This would be helpful.
Sorting Library
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I haven't been able to find a function, but it seems like there should be a way of sorting the library so you can feature your most common collections at the top of the list when you want go to add a game to the library.
Although there's the filter/search, it would be more user friendly to be able to pin or preorganise to choose which are at the top instead of the default newest first.