Did Microsoft recently changed the icons for Keys of a table?

I don't know when this might have happenned, Microsoft certainly seems to have changed the icons for Primary and Foreign keys in the Object Explorer of SQL Server Management Studio.

Here are examples from a previous version (SQL Server 2012 Express and the SSMS 2012).

Here are the same tables in the latest version SQL Server 2016 SP2; SQL Server Managment Studio Version 17.7.

The new keys lacks color, but it is better than the ones in previous version. The opposing directions are suggestive of the way they work.