Uses some ES6 syntax. Also removes inputHeight key for resolution as it makes no sence to have dictionary with one key. Removes some code duplication. Makes code consistent: method params for updateLocalStats and updateRemoteStats.

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

We initialise the UI for isModerator = false on startup, so we should
not react to the event unless it gets out of sync.

When we receive a conference failed event with reason not allowed we show that page.

When enabled after hanging up redirect to close page, if needed feedback will be displayed.

Moves handling of thank you dialog out of the Promise that handles the feedback and just before we redirect to welcome page.

VideoContainer is a separate being which implements the LargeContainer
and it's confusing to have it in the same file. This was encouraging to
access private parts of the VideoContainer directly(not through
the interface).

Adds a download logs method that can be called from console to take usefull messages for debugging.
console> APP.conference.saveLogs();

Receiving password required, marks the room as locked, but if we try to enter without password, mark it as unlocked till we receive a password required error or we successfully join.

Skips storing device ids in localstorage if the user hasn't selected a device to use, and keeps using system defaults. Removes calls to private library method for setting initial realDeviceIds, as this had been added to the library.

Removes storing avatarURL in localstorage and retrieving it.