External pix orders icon missing

[aftermath2]

Describe the bug

External orders using the Pix payment method display a custom payment method icon instead of the icon available in the source code. That's because the methods list contains PIX but not Pix as they are retrieved from the external source.

To Reproduce
Steps to reproduce the behavior:

1. Go to the orders page
2. Click on the hosted by dropdown and select the world icon
3. Filter by the BRL currency
4. Notice some pix orders displaying the platform's icon and some with a custom icon

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots

[KoalaSat]

This seems like someone manually input pix, and because our pm code for Pix is PIX, it didn´t match. We should implement lower case co,parison.