Issue #2298039 by lauriii, LewisNyman: Remove all PNG fallbacks for SVG.
Issue #2281699 by er.pushpinderrana, joshi.rohit100, esod | mirie: Fixed Update @see user_cancel_form() comments.
Issue #2294771 by tim.plunkett | anavarre: Fixed Add views display always defaults to attachment.
Issue #2262407 by slashrsm, roderik: Deprecate comment_get_display_page/ordinal().
Issue #2281475 by roderik, slashrsm: Deprecate comment_new_page_count() and move it functionality into Comment storage controller.
Issue #2297631 by martin107: Nudge contrib into overriding \Drupal\Core\TypedData\TypedData::setValue() consistently.
Issue #2292115 by slashrsm: Fixed Comment statistics is no correctly loaded into entity object if more than 1 comments field.
Issue #2293773 by Gábor Hojtsy, alexpott, penyaskito: Fixed migrations use dots in key names - not allowed in config.
Issue #2234159 by alexpott: Fixed config importing through the UI and change ConfigImportAll test using the UI.
Issue #2298993 by alexpott, tim.plunkett: Fixed routes using _entity_list wrongly are marked for upcasting.
Issue #2299457 by alexpott: remove unused UnsupportedConfigDataTypeException.
Issue #2239969 by znerol, alexpott, neclimdul, sun: Fixed session of (UI) test runner leaks into web tests.
Issue #2076325 by neclimdul, Mile23, alexpott: Fixed Drupal\Component\Utility\Url::externalIsLocal() is wrong in common cases.
Merge branch '8.x' into 1498662-comment-subject

Conflicts:
	core/modules/comment/comment.module
	core/modules/comment/src/CommentStorage.php