[MW] Add option to invert face buttons icons on UI for Nintendo Switch controller

[ryu-ketsueki]

This is a bit tricky to explain what is going on for me but in a nutshell, I own an 8BitDo Pro 2, the Nintendo Switch variant, but it also has an Xinput mode with analog triggers and stuff. But the face buttons are still in the Switch layout, so I have confirm on A and cancel on B, which works fine on the game, but the UI icons are showing B to confirm and A to cancel. X/Y are also swapped in the UI, so I need to tell my brain to press Y when the game shows an action on X. While I can fix this by just using the Xbox UI, I would prefer if there were still an option with the NS controller UI but with the face button icons unswapped.