Simplifie code and use formatSeconds()

Signed-off-by: Šimon Brandner <simon.bra.ag@gmail.com>

src/components/views/audio_messages/Clock.tsx

@@ -15,34 +15,30 @@ limitations under the License.
 */
 
 import React from "react";
+import { formatSeconds } from "../../../DateUtils";
 import { replaceableComponent } from "../../../utils/replaceableComponent";
 
 export interface IProps {
     seconds: number;
 }
 
-interface IState {
-}
-
 /**
  * Simply converts seconds into minutes and seconds. Note that hours will not be
  * displayed, making it possible to see "82:29".
  */
 @replaceableComponent("views.audio_messages.Clock")
-export default class Clock extends React.Component<IProps, IState> {
+export default class Clock extends React.Component<IProps> {
     public constructor(props) {
         super(props);
     }
 
-    shouldComponentUpdate(nextProps: Readonly<IProps>, nextState: Readonly<IState>, nextContext: any): boolean {
+    shouldComponentUpdate(nextProps: Readonly<IProps>): boolean {
         const currentFloor = Math.floor(this.props.seconds);
         const nextFloor = Math.floor(nextProps.seconds);
         return currentFloor !== nextFloor;
     }
 
     public render() {
-        const minutes = Math.floor(this.props.seconds / 60).toFixed(0).padStart(2, '0');
+        return <span className='mx_Clock'>{ formatSeconds(this.props.seconds) }</span>;
-        const seconds = Math.floor(this.props.seconds % 60).toFixed(0).padStart(2, '0'); // hide millis
-        return <span className='mx_Clock'>{ minutes }:{ seconds }</span>;
     }
 }