Windows mouse ungrab must release the mouse instead of confine it to the current desktop (#16488)

* Windows mouse ungrab should release the cursor, instead of confining it to the current screen.

* conform to style

gfx/common/win32_common.c

@@ -1958,11 +1958,11 @@ void win32_clip_window(bool state)
          free(info);
       }
       info = NULL;
+
+      ClipCursor(&clip_rect);
    }
    else
-      GetWindowRect(GetDesktopWindow(), &clip_rect);
-
-   ClipCursor(&clip_rect);
+      ClipCursor(NULL);
 }
 #endif