Unnamed fields are not visible in visualizers (ksv, Web IDE)
Currently, `_unnamed*` fields (which are created by omitting the `id` key in `seq` attributes) do not appear in object trees of either the Web IDE or the console visualizer. This is bad because the "unnamed fields" feature was added to KS mainly to make reverse-engineering work easier, because it saves you from having to assign bogus `id`s for fields with unknown purpose manually. But the fact that these unnamed fields are not visible in visualizers defeats their utility for reverse-engineering, because you need to see the values of these yet unknown fields to figure out their purpose over time. @GreyCat confirmed that this is how unnamed fields should be handled in https://github.com/kaitai-io/kaitai_struct/issues/52#issuecomment-262875543:

> Saving them (and even interpreting them as some proposed type) actually serves a very important function: you can view them in the visualizer. May be at first they won't make any sense (beyond seeing that it's a 4-byte long integer, for example), but at some moment later during reversing you might understand what it is - and, voila, all you have is to slap a name on it.

---

Personally, while working on the [`coreldraw_cdr.ksy`](https://github.com/kaitai-io/coreldraw_cdr.ksy/blob/master/coreldraw_cdr.ksy) specification and using [`ksdump`](https://github.com/kaitai-io/kaitai_struct_visualizer/blob/master/bin/ksdump) a lot to generate JSON dumps showing how real files are parsed, I realized I need to see the unnamed fields in the dumps in order to progress in reverse engineering, so I was patching `ksdump` locally to display them:

[**lib/kaitai/struct/visualizer/obj_to_h.rb:30**](https://github.com/kaitai-io/kaitai_struct_visualizer/blob/3ec1dceaa8a275f97a45870a8caabf2f1db479a7/lib/kaitai/struct/visualizer/obj_to_h.rb#L30)

```diff
-        next if k =~ /^_/
+        next if k =~ /^_(?!unnamed)/
```

But there's no reason why `ksdump` (or Web IDE) shouldn't handle this correctly out of the box.