Load RTE component only when needed (#9804)

Use react lazy to load rte component

src/components/views/rooms/wysiwyg_composer/DynamicImportWysiwygComposer.tsx

@@ -0,0 +1,36 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React, { ComponentProps, lazy, Suspense } from "react";
+
+const SendComposer = lazy(() => import("./SendWysiwygComposer"));
+const EditComposer = lazy(() => import("./EditWysiwygComposer"));
+
+export function DynamicImportSendWysiwygComposer(props: ComponentProps<typeof SendComposer>) {
+    return (
+        <Suspense fallback={<div />}>
+            <SendComposer {...props} />
+        </Suspense>
+    );
+}
+
+export function DynamicImportEditWysiwygComposer(props: ComponentProps<typeof EditComposer>) {
+    return (
+        <Suspense fallback={<div />}>
+            <EditComposer {...props} />
+        </Suspense>
+    );
+}