How to add composite data type attributes in redwood layout

Summary:

We are trying to add some composite data type attributes in Redwood layout but the attributes are not coming up in "Available Attributes" drop down.

Eg: _config_attributes, _config_attr_text, _config_attr_info

The above attributes belongs to "Config Attribute Set" in line level.

Steps to Replicate the issue:

Step1: Open the Redwood Layout in design mode.

Step2: Add a view and a section.

Setp3. Try to add one composite data type attribute using Customize Section. Any attribute that belongs to Composite data type is not coming up in "Available Attributes" drop down.

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