Handles the errors thrown by the data channel methods

Fixes issue with not removing connection interrupt label after reload

Fixes the gsm bars during ice disconnected

Changes the connection quality stats to be sent by the data channels

Uses videoType from the video track for the initial value.

Improve keyboard shortcut handling

Use KeyboardEvent.key if available,
match both lower and upper case letters to keep previous behaviour

KeyboardEvent is a mess.

KeyboardEvent.which gives you, in theory, a decimal representation of the key pressed.
"r" or "R" gives you 82, which is "R", you can look at KeyboardEvent.shiftKey,
but you don't have access to capslock...

Maybe you want to use numbers, but of course NumPad will not give you the same than
"normal" numbers ...

Now if you use something else than letter, for exemple "?",
on a QWERTY keyboard "/" and "?" gives you 191,
on a AZERTY keyboard "," and "?" gives you 188, so we have to stick to letters.

This was for keydown and keyup events, keypressed event return the real char
(lower "a", "/", "?", ...) but it fails in some cases

The only non broken property is KeyboardEvent.key,
but it's only supported since Chrome 51, Opera 38, and not supported by Safari
https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent/key

A good reference & test:
http://unixpapa.com/js/testkey.html
http://unixpapa.com/js/key.html

Signed-off-by: Etienne CHAMPETIER <champetier.etienne@gmail.com>

Revert "Changes the connection quality stats to be sent by the data channels"

Handles the case where the remote track is with initial value of camera and no further events are received for video type changed.

Changes the connection quality stats to be sent by the data channels

Adds Armenian and Occitan languages

Adds new languages to the language select box

Change reference to lib-jitsi-meet to use full github url

Avoids multiple dialog when showing lock attempt errors.

Fixes typo

Fixes the issue with missing audio element for remote participants