Axivion: Code cosmetics settings page

Just the code, the layout may need adjustment, too.
I find the "far away" Add/Remove/Edit column a bit ugly.

Change-Id: I617fc3d3c7b73e4cc92817833b857078681b9603
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/axivion/axivionsettings.cpp

@@ -397,8 +397,8 @@ AxivionSettingsWidget::AxivionSettingsWidget()
         Space(10),
         br,
         Row {settings().highlightMarks },
-        st}
-        .attachTo(this);
+        st
+    }.attachTo(this);
 
     connect(addButton, &QPushButton::clicked, this, [this] {
         // add an empty item unconditionally