Missing schema for social_comment.comment_settings

Problem

There is no schema declaration for the social_comment.comment_settings config object.

Proposed solution

Add a config/schema/social_comment.schema.yml file with the following contents:

social_comment.comment_settings:
  type: config_object
  label: 'Social Comment Settings'
  mapping:
    redirect_comment_to_entity:
      type: boolean
      label: 'Redirect a comment view to its parent entity'

Needed discussion

Discuss whether the labels/descriptions are correct.