[commerce_product_display_manager] Commerce (Product Display Manager)

# Summary

This provided a simplified way to manage product displays in 1.x. However, in 2.x things are simplified and we do not use the node system at all.

# Project URL

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# Where is the code?

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# Estimated completion date

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# Dependencies

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# Who's doing the port?

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# What help do they need?

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# D8 roadmap

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# Background and reference information

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