The two settings for blinking windows are not next to each other. There is a setting to shade the window with the mouse wheel that seems unreleated. Since the two settings about blinking is releated i suggest having them next to each other.
Created attachment 8638 patch
Can you please resubmit the patch using common format for commit messages?
Created attachment 8662 updated patch
Andre Miranda referenced this bugreport in commit cc79676597f6eb24be2e54bd5191bd45dc75c0bd settings-dialog: Sort settings https://git.xfce.org/xfce/xfwm4/commit?id=cc79676597f6eb24be2e54bd5191bd45dc75c0bd