The bug
When deleting a skin with a long name, the name is not shortened using an ellipsis. Instead, if the name is long enough, it will be cut off inside its box.
To reproduce
Open the Minecraft Launcher, and navigate to the Skins tab -> New skin
Set the name to the text on this page
Select "Save"
Select "Delete" for the skin just created
❌ The text is not completely shown, and is cut off at the bottom
Fixed some time between 2.3.200 and 2.3.217. 🙂