Issue #2195745 by sun: Replace _filter_htmlcorrector() with a utility class in core.

core/includes/mail.inc

core/lib/Drupal/Component/Utility/Html.php

core/modules/editor/editor.module

core/modules/field/field.module

core/modules/file/file.field.inc

core/modules/filter/filter.module

.../filter/lib/Drupal/filter/Plugin/Filter/FilterCaption.php

...r/lib/Drupal/filter/Plugin/Filter/FilterHtmlCorrector.php

...modules/filter/lib/Drupal/filter/Tests/FilterUnitTest.php

...ules/system/lib/Drupal/system/Tests/Common/RenderTest.php

core/modules/text/text.module

...s/lib/Drupal/views/Plugin/views/field/FieldPluginBase.php