Created attachment 7954 Improved Spacing The attached patch applies the standard 6/12/18 spacing to the Status Notifier Plugin preferences dialog. Additionally, deprecated properties found in the interface file have been removed.
Sean Davis referenced this bugreport in commit 0658b4a184c65a4eda7942e9dcf446d2fff0eaad Preferences: Improved spacing, dropped deprecated properties (bug #14676) https://git.xfce.org/panel-plugins/xfce4-statusnotifier-plugin/commit?id=0658b4a184c65a4eda7942e9dcf446d2fff0eaad
Patch applied with the above commit.