That editor web application could be used from anywhere, from any web browser, and now it can.
GitHub - Microsoft/monaco-editor: A browser based code editor
Announcing the Azure Cloud Shell editor in collaboration with Visual Studio Code | Blog | Microsoft Azure
"...to embed Cloud Shell inside of Visual Studio Code and the Azure mobile app team to integrate Cloud Shell into the Azure mobile app for easy access from mobile devices everywhere."
Azure Cloud Shell – Browser-Based Command Line | Microsoft Azure