Not saving changed skin names

The bug

I got like 60 new skins (I like skins) and I started naming them. I clicked X on the launcher to close it. I went back in and the skins I just named said "unnamed skin" but i just named them.

Steps to reproduce

• get a lot of new skins.
• name 10 of them.
• X-et out of the launcher.
• Go back in and look at the skins you just named.

Observed results.

I put the names back on after about 10 seconds. But shouldn't it save it?