Discussion? Argument border_with is not scaled.
If I want scale Pyxel window, and add an border to it, border has always value in pixels while rest of the screen is pixels*scale.

app.py lines 61 and 62:
```
window_width = width * scale + border_width
window_height = height * scale + border_width
```

Shouldn't be border scaled together with "work area"? I mean for me it's a little not natural if part of screen is scaled and part of it's not.
Shouldn't be fixed with:
```
window_width = (width + border_width) * scale
window_height = (height + border_width) * scale
```
?