Fix progress bar regression throughout the app (#9219)

* Fix useSmoothAnimation enablement not working properly by getting rid of it

Passing duration=0 is more logical and less superfluous

* Refactor UploadBar to handle state more correctly

* Change ProgressBar to new useSmoothAnimation signature and default animated to true for consistency

* Add type guard

* Make types stricter

* Write tests for the ProgressBar component

* Make the new test conform to tsc --strict

* Update UploadBar.tsx

* Update UploadBar.tsx

* Update UploadBar.tsx

test/components/views/elements/ProgressBar-test.tsx

@@ -0,0 +1,53 @@
+/*
+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 from "react";
+import { act, render } from "@testing-library/react";
+
+import ProgressBar from "../../../../src/components/views/elements/ProgressBar";
+
+jest.useFakeTimers();
+
+describe("<ProgressBar/>", () => {
+    it("works when animated", () => {
+        const { container, rerender } = render(<ProgressBar max={100} value={50} animated={true} />);
+        const progress = container.querySelector<HTMLProgressElement>("progress")!;
+
+        // The animation always starts from 0
+        expect(progress.value).toBe(0);
+
+        // Await the animation to conclude to our initial value of 50
+        act(() => { jest.runAllTimers(); });
+        expect(progress.position).toBe(0.5);
+
+        // Move the needle to 80%
+        rerender(<ProgressBar max={100} value={80} animated={true} />);
+        expect(progress.position).toBe(0.5);
+
+        // Let the animaiton run a tiny bit, assert it has moved from where it was to where it needs to go
+        act(() => { jest.advanceTimersByTime(150); });
+        expect(progress.position).toBeGreaterThan(0.5);
+        expect(progress.position).toBeLessThan(0.8);
+    });
+
+    it("works when not animated", () => {
+        const { container, rerender } = render(<ProgressBar max={100} value={50} animated={false} />);
+        const progress = container.querySelector<HTMLProgressElement>("progress")!;
+
+        // Without animation all positional updates are immediate, not requiring timers to run
+        expect(progress.position).toBe(0.5);
+        rerender(<ProgressBar max={100} value={80} animated={false} />);
+        expect(progress.position).toBe(0.8);
+    });
+});