CKEditor components replaced by CKEditor 5.

Remains of the sandboxed CKEditor - will be removed, but the version here may be useful for another editor that is prone to XSS (like Summernote).

client/src/lib/sandboxed-ckeditor-root.js

@@ -0,0 +1,23 @@
+'use strict';
+
+import './public-path';
+
+import React from 'react';
+import ReactDOM from 'react-dom';
+import {I18nextProvider,} from 'react-i18next';
+import i18n from './i18n';
+import {CKEditorSandbox} from './sandboxed-ckeditor';
+import {UntrustedContentRoot, parentRPC} from './untrusted';
+
+export default function() {
+    parentRPC.init();
+
+    ReactDOM.render(
+        <I18nextProvider i18n={ i18n }>
+            <UntrustedContentRoot render={props => <CKEditorSandbox {...props} />} />
+        </I18nextProvider>,
+        document.getElementById('root')
+    );
+};
+
+