OGC: SDL2 has no support for Widescreen.

## Bug Report

### What's the issue you encountered?

Unlike SDL1.2 OGC, SDL2 is missing the 848*480 window mode, making the screen look off when the SDL Windows is set to that resolution, preventing proper Widescreen support on Wii.

### How can the issue be reproduced?

Set the SDL Window resolution to 848*480

### Environment?

N/A

### Additional context?

Unknown