Fixes jitsi/jitsi-meet-electron#902.

While the host arrives all other participants are waiting in lobby and once the host arrives lobby is destroyed and the participants join the call.
Adds reading some other fields in jwt to extract email.
Introduces tokenLogoutUrl to be used for logout.

* feat: Drops connection on prejoin screen.

Refactors connection logic to reuse already existing logic from mobile. Connection is now established just before joining the room.
Fixes some authentication logic with Login and Logout button in Profile tab.

* squash: Drops createInitialLocalTracksAndConnect as it no longer connects.

* squash: Shows an error on mobile and redirects to default.

* squash: Fixes review comments.

* squash: Fixes joining with prejoin disabled.

* squash: Fixes adding initial local tracks.

* squash: Fixes comments.

* squash: Drop no longer used method.

* squash: Fixes old web code imported into mobile builds.

* squash: Drop unused prop.

* squash: Drops recoverable flag on REDIRECT.

* squash: Drops unused variable and fix connection access.

* squash: Xmpp connect returns promise again.

* squash: Execute xmpp connect and creating local tracks in parallel.

* squash: Moves notification about problem jwt.

* squash: Moves startConference to conference.js for the no prejoin case.

And move the startConference in prejoin feature for the prejoin case.

* squash: Fix passing filtered tracks when starting conference with no prejoin.

* squash: Fix clearing listeners on connection established.

Keeps mobile behaviour after merging web and mobile.

* squash: Drops unused code.

* fix(authentication) login dialog now closes when connection is established

* fix(authentication) fixed shibboleth auth

* fix(authentication) renamed authenticateExternal func to authenticate and updated its logic

* fix(authentication)removed logindialog.js and created actions.any

* fix(authentication) removed focus from externalauthwindow

* fix(authentication) removed private sign from some actions and added openLoginDialog to actions.any

* fix(authentication) exported all from actions.any

* fix(authentication) reverted change regarding externalAuth

* fix(authentication) fixed indentation