Beta Jitsi Integration (#3476)

* Start on Jitsi Package

* add package files

* initial proof of concept ui skeleton

* Basic working jitsi implementation

* Added ssl flag to jitsi meet constructor

* Try UI that auto starts call on tab open

* Add timeout for name setting

* fix the room width when flextab is 790px wide

* Adds admin settings for Jitsi;
Calls jitsi:connect on tabbar open and disconnect on close;
Uses instance_id + room_id for jitsi id;

* changed JitsiMeet ssl flag.  Flag now means no SSL.  So its going to use ssl by default

* Add SSL option for Jitsi;
Fixed ESLint errors found

* Default Jitsi SSL to true

* Adds option of colors into tabbar;

* Made settings public

* Make settings public; Add blinking support;

* Started on call timeout

* clearInterval and dispose

* Clean up and keep from showing multiple instances.

* switch setInterval and setTimeout to Meteor methods

* move api.dispose into defer.  Switch back to non-verbose logging on external_api.js

* removed debug logging

* Remove un-needed header on template

* Move external_api.js inside for onprem that don't allow any external

* Allow actionLinks server side as well as client side

* Add the ability to add an icon with the actionLink

* Added messageType and actionLink to join call.  Fixed timeout issues

* Allow Jitsi for Channels

* remove watermark - confuses some naiive users

* Added Beta warning.  Fixed some bugs changing rooms

* Fixed some eslint issues