Merge branch '8.x-3.x' into field-mapping-ui

* 8.x-3.x:
  by aaronbauman - Add method chaining to RestClient when possible
  Fix overwriting refresh token on re-auth
  Alpha sort the entity type options.
  Don't let date trigger field validation block necessary form AJAX.
  Clean up unused code.
  Clean up use statements in CRUD form.
  Refactor get_salesforce_object() to tolerate empty values.

Conflicts:
	modules/salesforce_mapping/src/Form/SalesforceMappingFieldsForm.php
	modules/salesforce_mapping/src/Form/SalesforceMappingFormCrudBase.php