Speed up IDE startup time.

Signed-off-by: Akos Kitta <a.kitta@arduino.cc>

arduino-ide-extension/src/browser/serial/monitor/monitor-view-contribution.tsx

@@ -62,7 +62,7 @@ export class MonitorViewContribution
     });
   }
 
-  registerMenus(menus: MenuModelRegistry): void {
+  override registerMenus(menus: MenuModelRegistry): void {
     if (this.toggleCommand) {
       menus.registerMenuAction(ArduinoMenus.TOOLS__MAIN_GROUP, {
         commandId: this.toggleCommand.id,
@@ -95,7 +95,7 @@ export class MonitorViewContribution
     });
   }
 
-  registerCommands(commands: CommandRegistry): void {
+  override registerCommands(commands: CommandRegistry): void {
     commands.registerCommand(SerialMonitor.Commands.CLEAR_OUTPUT, {
       isEnabled: (widget) => widget instanceof MonitorWidget,
       isVisible: (widget) => widget instanceof MonitorWidget,

arduino-ide-extension/src/browser/serial/monitor/monitor-widget.tsx

@@ -75,21 +75,21 @@ export class MonitorWidget extends ReactWidget {
     this.update();
   }
 
-  dispose(): void {
+  override dispose(): void {
     super.dispose();
   }
 
-  protected onAfterAttach(msg: Message): void {
+  protected override onAfterAttach(msg: Message): void {
     super.onAfterAttach(msg);
     this.serialConnection.openWSToBE();
   }
 
-  onCloseRequest(msg: Message): void {
+  protected override onCloseRequest(msg: Message): void {
     this.closing = true;
     super.onCloseRequest(msg);
   }
 
-  protected onUpdateRequest(msg: Message): void {
+  protected override onUpdateRequest(msg: Message): void {
     // TODO: `this.isAttached`
     // See: https://github.com/eclipse-theia/theia/issues/6704#issuecomment-562574713
     if (!this.closing && this.isAttached) {
@@ -97,13 +97,13 @@ export class MonitorWidget extends ReactWidget {
     }
   }
 
-  protected onResize(msg: Widget.ResizeMessage): void {
+  protected override onResize(msg: Widget.ResizeMessage): void {
     super.onResize(msg);
     this.widgetHeight = msg.height;
     this.update();
   }
 
-  protected onActivateRequest(msg: Message): void {
+  protected override onActivateRequest(msg: Message): void {
     super.onActivateRequest(msg);
     (this.focusNode || this.node).focus();
   }

arduino-ide-extension/src/browser/serial/monitor/serial-monitor-send-input.tsx

@@ -32,7 +32,7 @@ export class SerialMonitorSendInput extends React.Component<
     this.onKeyDown = this.onKeyDown.bind(this);
   }
 
-  componentDidMount(): void {
+  override componentDidMount(): void {
     this.props.serialConnection.isBESerialConnected().then((connected) => {
       this.setState({ connected });
     });
@@ -50,12 +50,12 @@ export class SerialMonitorSendInput extends React.Component<
     ]);
   }
 
-  componentWillUnmount(): void {
+  override componentWillUnmount(): void {
     // TODO: "Your preferred browser's local storage is almost full." Discard `content` before saving layout?
     this.toDisposeBeforeUnmount.dispose();
   }
 
-  render(): React.ReactNode {
+  override render(): React.ReactNode {
     return (
       <input
         ref={this.setRef}

arduino-ide-extension/src/browser/serial/monitor/serial-monitor-send-output.tsx

@@ -29,7 +29,7 @@ export class SerialMonitorOutput extends React.Component<
     };
   }
 
-  render(): React.ReactNode {
+  override render(): React.ReactNode {
     return (
       <List
         className="serial-monitor-messages"
@@ -51,11 +51,11 @@ export class SerialMonitorOutput extends React.Component<
     );
   }
 
-  shouldComponentUpdate(): boolean {
+  override shouldComponentUpdate(): boolean {
     return true;
   }
 
-  componentDidMount(): void {
+  override componentDidMount(): void {
     this.scrollToBottom();
     this.toDisposeBeforeUnmount.pushAll([
       this.props.serialConnection.onRead(({ messages }) => {
@@ -87,7 +87,7 @@ export class SerialMonitorOutput extends React.Component<
     ]);
   }
 
-  componentWillUnmount(): void {
+  override componentWillUnmount(): void {
     // TODO: "Your preferred browser's local storage is almost full." Discard `content` before saving layout?
     this.toDisposeBeforeUnmount.dispose();
   }

arduino-ide-extension/src/browser/serial/plotter/plotter-frontend-contribution.ts

@@ -45,7 +45,7 @@ export class PlotterFrontendContribution extends Contribution {
   @inject(BoardsServiceProvider)
   protected readonly boardsServiceProvider: BoardsServiceProvider;
 
-  onStart(app: FrontendApplication): MaybePromise<void> {
+  override onStart(app: FrontendApplication): MaybePromise<void> {
     this.url = new Endpoint({ path: '/plotter' }).getRestUrl().toString();
 
     ipcRenderer.on('CLOSE_CHILD_WINDOW', async () => {
@@ -56,13 +56,13 @@ export class PlotterFrontendContribution extends Contribution {
     return super.onStart(app);
   }
 
-  registerCommands(registry: CommandRegistry): void {
+  override registerCommands(registry: CommandRegistry): void {
     registry.registerCommand(SerialPlotterContribution.Commands.OPEN, {
       execute: this.connect.bind(this),
     });
   }
 
-  registerMenus(menus: MenuModelRegistry): void {
+  override registerMenus(menus: MenuModelRegistry): void {
     menus.registerMenuAction(ArduinoMenus.TOOLS__MAIN_GROUP, {
       commandId: SerialPlotterContribution.Commands.OPEN.id,
       label: SerialPlotterContribution.Commands.OPEN.label,