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/sass/responsive/_desktop.scss

@@ -2,7 +2,8 @@
 
 @media screen and (max-width: 1800px) {
     .inner-wrap {
-        &.move--left {
+        &.move--left,
+        &.webrtc--show {
             .date-separator,
             .new-separator {
                 &.hovered--comment {
@@ -18,7 +19,8 @@
 
 @media screen and (max-width: 1440px) {
     .inner-wrap {
-        &.move--left {
+        &.move--left,
+        &.webrtc--show {
             .help__format-text {
                 display: none;
             }
@@ -53,7 +55,8 @@
     }
 
     .inner-wrap {
-        &.move--left {
+        &.move--left,
+        &.webrtc--show {
             .file-overlay {
                 font-size: em(18px);