Scroll bar is shown for tiny padding space in the 3rd row

[senntore]

I think app library should be a little more taller or the padding needs to be smaller, so that it can show all of the 3 row(even the padding for the icons).

Because as you can see in the recording, the scrollbar shows up for the tiny padding space even though there isn't much point to scroll there.

Recording:

https://github.com/pop-os/cosmic-applibrary/assets/58325574/86542062-a821-45a6-9b89-8459001bd97b