rawinput: deal with high poll rate devices, use 3x3 for default for rb touch emu (#796)

## Link to GitHub Issue or related Pull Request, if one exists
n/a

## Description of change
Two changes:

1. Handle all HID events in `WM_INPUT` and not just the first one. This
only really affects 4000Hz / 8000Hz HID devices.
2. Go back to `3x3` as the default for rb IR touch emulation and remove
`1x1` as an option as it does not perform as well as I expected.

## Testing

src/spice2x/games/rb/rb.h

@@ -7,7 +7,6 @@
 namespace games::rb {
 
     extern uint16_t TOUCH_SCALING;
-    extern uint8_t TOUCH_SIZE;
     extern uint16_t TOUCH_POLL_RATE;
 
     class RBGame : public games::Game {