Webrtc client side (#4026)

* WebRTC Server side

* WebRTC client side

* Bug fixes and improvements

* Pushing UI improvements for webrtc (#3728)

* Pushing UI improvements for webrtc

* Updating webrtc css

* PLT-3943 WebRTC P1: bug fixes and improvements

* Video resolution set to std, reduce volume of ringtone and flip video horizontally

* Fix calling a user B while WebRTC RHS is still opened

* Leave RHS opened when call ends, Fix isBusy on popover and channel_header

* Fix pre-release feature, RHS & System Console

* PLT-3945 - Updating UI for webrtc (#3908)

* PLT-3943 Webrtc p1

* Add ongoing call indicator when RHS is opened

* UI updates to to webrtc notifcation (#3959)

webapp/package.json

@@ -33,6 +33,7 @@
     "superagent": "2.1.0",
     "twemoji": "2.0.5",
     "velocity-animate": "1.2.3",
+    "webrtc-adapter": "1.4.0",
     "xregexp": "3.1.1"
   },
   "devDependencies": {