Fixes resolving this when passing function after enabling es6.

This currently fixes problem for participants joining in a room with other participants and trying to send initial value of selected local participant will throw an error. And fixes a potential problem if the UI can select participants before their video is available, before session initiated, can make local state with jvb inconsistent. Also if we want to have multiple selected endpoints or pinned participants and this is done before session-initiate caching should be done before creating data channel (currently selecting multiple is not possible).

The places of the two arguments of the function createConnection were
switched in the function definition but the call to the function
remained unchanged.

Because the flag is required in the connection options anyway it will
be better to use it from one options set only to avoid redundancy.

The event is triggered when Jicofo sends 'session-terminate' and our
PeerConnection is closed.

Passing the browser name as parameter.

Fix broken variable

Finds correct error when getUserMedia succeed with only one of the audio or video, and the other fails.

Fixes the availableDevices, to reflect the devices for which we succeeded or failed to obtain stream.

removed white space
redid the hooking of the Transcribing module to JitsiConference
redid the exposing of the Transcribing module to JitsiMeetJs