Corner radius does not line up.

[dwnsdp]

Sorry for making an issue for something which is admittedly a very minor problem.
But it has been bugging me since I first installed Cosmic and as it is a relatively small fix I thought I ought make an issue.

The corner radius in the launcher is for some reason bigger inside a nested box rather than smaller, and it looks really strange.
Here is what it looks like right now:

Here is what it should look like:

[Delta-Azura]

I tried my best with the cosmic-launcher code but i think that the real issue might be directly on the cosmic-comp