message: Add an subtle border around subclass path indicator to improve contrast against the new Arc subclass base image.
diff: -<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48"><rect transform="rotate(-45)" y="17.470564" x="-16.470564" height="32.941124" width="32.941124" style="opacity:1;fill:none;fill-opacity:1;stroke:#dddddd;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" /><rect style="opacity:1;fill:#dddddd;fill-opacity:1;stroke:none;stroke-width:1.99999976;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" width="8.485281" height="8.485281" x="8.4852791" y="16.970564" transform="rotate(-45)" /></svg>
  \ No newline at end of file
  +<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 48 48"><rect style="opacity:1;fill:#dddddd;fill-opacity:1;stroke:#000;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:0,16.970562,25.455843;stroke-opacity:0.2" width="8.485281" height="8.485281" x="8.4852791" y="16.970564" transform="rotate(-45)" /><rect transform="rotate(-45)" y="17.470564" x="-16.470564" height="32.941124" width="32.941124" style="opacity:1;fill:none;fill-opacity:1;stroke:#dddddd;stroke-width:1;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1" /></svg>
  \ No newline at end of file
  