When I only press 'alt' key, I found 'alt' key dos not key_up, next, if I press the 'tab' key or 'esc' key, it show me 'alt+tab' and 'alt+esc', this is not my expectation. How to make ALT key up or release immediately? I think it's a bug. I must to press 'alt' key for a long time to get it release.

According to MDN, we should most definitely not be using the .keyCode property. It is deprecated:

https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/keyCode

On W3 school, this fact is played down and there is only a side note saying that .keyCode is provided for compatibility only and that the latest vers

It would be nice to have a option to turn on a static tray icon, so that the icon stays even after you have opened the application.