Checklist

This is a Bug Report

Problem:

The Yarn Debian key has expired for the script in [Ubuntu, Debian or HypriotOS](https://kubernetes.io/docs/set

Displaying the current tool number {after T0/T1/T2/...) on the screen would be helpful with MMU2 or other toolchanger.
The number can be displayed inside the nozzle picture.

it would be good to have
min-width, max-width <-- this 2 is good for PWA, if user resized it too small, it would become ugly.
maximized <-- this would be maximized on first load.

another thing would be, try delay webview resize when the host window resize, like how all the browser did, this would make sure PWA reflective size won't response immediately... current resize is seriously lagging

Describe the bug
I tried to build this app on Ubuntu 20.10 for the Raspberry Pi, npm install finished successfully but when running npm start the tray icon appears but nothing else works. clicki