Follow-up from "Resolve "Squash and merge in GitLab Core (CE)""

The following discussion from gitlab-ce!18956 should be addressed:

• @kushalpandya started a discussion: (+2 comments)

  Default size for icon is 16px, is that something we want? Can you update MR description with screenshots so that someone from gitlab-ce~2024184 can have a look at how this icon will end up looking like. 🙂

The elements of the MR widget raw are misaligned by vertical:

I think they should be aligned.