NodeRow: Use symbols instead of names.

            node_key = (quote_key(key)) ? @"“$(key)”" : key;

            switch (node.get_node_type()) {

            case Json.NodeType.ARRAY:

                node_type = "Array";

                node_type = "[]";

                css_type = new string[] { "array-type" };

                css_key = new string[] { "array-key" };

                break;

            case Json.NodeType.NULL:

                node_type = "null";

                node_type = "␀";

                css_type = new string[] { "null-type" };

                break;

            case Json.NodeType.OBJECT:

                node_type = "Object";

                node_type = "{}";

                css_type = new string[] { "object-type" };

                css_key = new string[] { "object-key" };

                break;

            case Json.NodeType.VALUE:

                node_type = "Value";

                node_type = "$";

                node_value = get_value_node_text(node);

                css_type = new string[] { "value-type" };

                css_key = new string[] { "value-key" };