yuzu/util: Antialias game list compatibility pixmaps

We pass a hint to the QPainter instance that we want anti-aliasing on
the compatibility icons, which prevents the circles from looking fairly
jagged, and actually makes them look circular.

src/yuzu/util/util.cpp

@@ -30,8 +30,9 @@ QPixmap CreateCirclePixmapFromColor(const QColor& color) {
     QPixmap circle_pixmap(16, 16);
     circle_pixmap.fill(Qt::transparent);
     QPainter painter(&circle_pixmap);
+    painter.setRenderHint(QPainter::Antialiasing);
     painter.setPen(color);
     painter.setBrush(color);
-    painter.drawEllipse(0, 0, 15, 15);
+    painter.drawEllipse({circle_pixmap.width() / 2.0, circle_pixmap.height() / 2.0}, 7.0, 7.0);
     return circle_pixmap;
 }