disable private chat initiation in breakouts

bigbluebutton-html5/imports/ui/components/chat/service.js

@@ -7,6 +7,7 @@ import UnreadMessages from '/imports/ui/services/unread-messages';
 import Storage from '/imports/ui/services/storage/session';
 import { makeCall } from '/imports/ui/services/api';
 import _ from 'lodash';
+import { meetingIsBreakout } from '/imports/ui/components/app/service';
 
 const CHAT_CONFIG = Meteor.settings.public.chat;
 const GROUPING_MESSAGES_WINDOW = CHAT_CONFIG.grouping_messages_window;
@@ -141,6 +142,11 @@ const isChatLocked = (receiverID) => {
     { fields: { role: 1 } });
   const isReceiverModerator = receiver && receiver.role === ROLE_MODERATOR;
 
+  // disable private chat in breakouts
+  if (meetingIsBreakout()) {
+    return !isPublic;
+  }
+
   if (meeting.lockSettingsProps !== undefined) {
     if (user.locked && user.role !== ROLE_MODERATOR) {
       if (isPublic) {

bigbluebutton-html5/imports/ui/components/user-list/user-list-content/user-participants/user-list-item/user-dropdown/component.jsx

@@ -294,7 +294,7 @@ class UserDropdown extends PureComponent {
       ));
     }
 
-    if (CHAT_ENABLED && enablePrivateChat && isMeteorConnected) {
+    if (CHAT_ENABLED && enablePrivateChat && !meetingIsBreakout && isMeteorConnected) {
       actions.push(this.makeDropdownItem(
         'activeChat',
         intl.formatMessage(messages.ChatLabel),