Caibration: Improve UI #2381
Description
* I know the calibration is supposed to be quick, but by default, we could have a progress bar saying "calibrating". Somehow, my calibration got stuck in one of my tests, and I waited for a minute, I forgot to see the console and hit F5.
edit: It happened again. Nothing in the console, it took around 3 minutes to calibrate.
Another UI thing: can we remove this bar?
Originally posted by @joaoantoniocardoso in #2342 (comment)