Render Jitsi (and other sticky widgets) in PiP container, so it can be dragged and the "jump to room functionality" is provided (#7450)

Co-authored-by: J. Ryan Stinnett <jryans@gmail.com>

src/components/views/voip/PipContainer.tsx

@@ -0,0 +1,38 @@
+/*
+Copyright 2020 The Matrix.org Foundation C.I.C.
+Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
+
+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 from 'react';
+
+import PipView from './PipView';
+import { replaceableComponent } from "../../../utils/replaceableComponent";
+
+interface IProps {
+
+}
+
+interface IState {
+
+}
+
+@replaceableComponent("views.voip.PiPContainer")
+export default class PiPContainer extends React.PureComponent<IProps, IState> {
+    public render() {
+        return <div className="mx_PiPContainer">
+            <PipView />
+        </div>;
+    }
+}