fixup! chore: use theia@1.46.1

Use changes from #2362 and rebase on main branch

Author: giacomocusinato

arduino-ide-extension/src/electron-main/theia/electron-main-application.ts

@@ -212,12 +212,16 @@ export class ElectronMainApplication extends TheiaElectronMainApplication {
           this._appInfo = updateAppInfo(this._appInfo, this._config);
           this.hookApplicationEvents();
           this.showInitialWindow(undefined);
-          const port = await this.startBackend();
+          const [port] = await Promise.all([
+            this.startBackend(),
+            app.whenReady(),
+          ]);
           this.startContentTracing();
           this._backendPort.resolve(port);
-          await app.whenReady();
-          await this.attachElectronSecurityToken(port);
-          await this.startContributions();
+          await Promise.all([
+            this.attachElectronSecurityToken(port),
+            this.startContributions(),
+          ]);
           this.handleMainCommand({
             file: args.file,
             cwd,