Setted window "spawn point" to middle of screen

examples/quickwings/quickwings.cpp

@@ -319,7 +319,7 @@ auto main() -> int {
 */
     window
         .set_size(size)                                    // ... Grösse
-        .set_position(paradiso::Point{.x = 100, .y = 100}) // ... Position
+        .set_position(paradiso::Point{.x = 1920 / 2 - 500 / 2, .y = 1080 / 2 - 700 / 2}) // ... Position
         .set_title("PardiSO.FlappyBird")                   // ... Titel
         .set_visible(true); // ... und jetzt anzeigen!