It’s actually a Christmas Egg, but it makes me smile every year in December. A bit hard to spot and I must admit I thought my icons were corrupt the first time I noticed it.
The small Santa’s hat is what I’m talking about, as you can see in this screenshot:
(Did you notice it!?!?)
If you didn’t, no worries; here it is again: 
Kudos to the OBPM devvers!
I want to be a superhero, and also a ninja! Why choose?