Issue #1892182 by sun, nod_, jibran: #type details: Rename #collapsed to #open.

core/includes/form.inc

core/lib/Drupal/Core/Database/Install/Tasks.php

core/lib/Drupal/Core/FileTransfer/FileTransfer.php

...lib/Drupal/Core/Update/Form/UpdateScriptSelectionForm.php

...s/action/lib/Drupal/action/Form/ActionAdminManageForm.php

...es/aggregator/lib/Drupal/aggregator/Form/SettingsForm.php

...gregator/Plugin/aggregator/processor/DefaultProcessor.php

...egator_test/Plugin/aggregator/processor/TestProcessor.php

...ock/lib/Drupal/custom_block/CustomBlockFormController.php

...lib/Drupal/custom_block/CustomBlockTypeFormController.php

core/modules/block/lib/Drupal/block/BlockFormController.php

core/modules/block/lib/Drupal/block/BlockListController.php

core/modules/book/lib/Drupal/book/BookManager.php

...es/ckeditor/lib/Drupal/ckeditor/CKEditorPluginManager.php

core/modules/color/color.module

...ules/comment/lib/Drupal/comment/CommentFormController.php

.../comment/lib/Drupal/comment/Form/CommentAdminOverview.php

...lib/Drupal/comment/Plugin/Field/FieldType/CommentItem.php

...Drupal/comment/Plugin/Field/FieldWidget/CommentWidget.php

...pal/config_translation/Form/ConfigTranslationFormBase.php