Sorry for the horrible issue title, not quite sure how to title this.

I wanted to include emojis in my description ('cause Apple engineers need some ❤️ and ✨ too). On inserting one with macOS' emoji picker something about my input changed. Typed spaces were much wider, text was monospaced. I've seen something similar happening in the commit text field in SourceTree, but nowhere else before. Not sure what that is, I'm not very familiar with NSTextFields and their API to have something particular in mind.