Adds a property to hide display name and disable update view in SmallVideo. Localvideo hides displayName and disabled update view while users is editing its name and resumes normal behaviour when editing finishes.

Enable ESLint on jitsi-meet with the same configuration and the same
goals as in lib-jitsi-meet.

At any point of time we display one of the three: video, avatar or
blackness. The purpose of this commit is to make that fact more clear
in the code.

Adds more analytics events for shortcuts, recording and shared video. Changes the way we calculate ttfm.