src/vs/workbench/contrib/preferences/browser/preferencesEditor.ts/PreferencesEditor/clearInput
class PreferencesEditor:	override clearInput(): void {
		this.defaultSettingsEditorContextKey.set(false);
		this.defaultSettingsJSONEditorContextKey.set(false);
		this.sideBySidePreferencesWidget.clearInput();
		this.preferencesRenderers.onHidden();
		super.clearInput();
	}