Show detached visualizers in popovers and inline ones in place. Move
through the tree with the keyboard, and scroll the hex view and the
tree separately.
Store them with the REPL cell and the address insight, as a JSON
column each, and bind the decode view to them. Older rows and wire
cells without the field decode as none.
Place a struct at any byte from the context menu, or run a file's own
placements. Outline each leaf field in the hex view, and select the
innermost field on a byte click.