message: render optional inline-field-editors in overlay
diff: {{#overlay-marks group="cardstack-fields" as |mark|}}
  - {{create-overlay at=mark
  + {{#create-overlay at=mark
  label=(cs-humanize mark.model.name)
  highlighted=(eq mark.id tools.highlightedFieldId)
  hoverable=tools.editing
  onclick=(action "openField" mark)
  dismiss=(action "openField" null)
  }}
  -
  + {{#if (and (eq mark.id tools.openedFieldId) (not mark.model.grouped)) }}
  + {{#with (cs-field-editor-for mark.model.content mark.model.name variant="inline") as |editorName|}}
  + {{#if (is-component editorName)}}
  + {{component editorName content=mark.model.content field=mark.model.name enabled=true}}
  + {{/if}}
  + {{/with}}
  + {{/if}}
  + {{/create-overlay}}
  {{/overlay-marks}}
  