Issue #2326409 by Berdir, tim.plunkett: Annotate render element plugins.

core/includes/common.inc

core/modules/contextual/contextual.module

core/modules/contextual/src/Element/ContextualLinks.php

...les/contextual/src/Element/ContextualLinksPlaceholder.php

core/modules/field_ui/field_ui.module

core/modules/field_ui/src/Element/FieldUiTable.php

core/modules/filter/filter.module

core/modules/filter/src/Element/ProcessedText.php

core/modules/filter/src/Element/TextFormat.php

core/modules/language/language.module

core/modules/language/src/Element/LanguageConfiguration.php

core/modules/toolbar/src/Element/Toolbar.php

core/modules/toolbar/src/Element/ToolbarItem.php

core/modules/toolbar/toolbar.module

core/modules/views/src/Element/View.php

core/modules/views/views.module