Prevent comments from being processed when selected in the layers tree.

src/commands/view/ShowOffset.ts

@@ -18,9 +18,9 @@ export default {
     const zoom = this.em.getZoomDecimal();
     const el = opt.el as HTMLElement | undefined;
 
-    // if (!(el instanceof HTMLElement)) {
-    //   return;
-    // }
+    if (!(el instanceof HTMLElement)) {
+      return;
+    }
 
     if (!config.showOffsets || !el || isTextNode(el) || (!config.showOffsetsSelected && state == 'Fixed')) {
       editor.stopCommand(`${this.id}`, opts);