fix: undefined accesses causes crashes in actions-bar breakout utils

Multiple undefined accesses in actions-bar's service, mainly related to
breakouts and ageneral Meetings info, cause crashes in production
environments - most likely in reconnection scenarios.

Guarantee that nested data is safely accessed.

bigbluebutton-html5/imports/ui/components/actions-bar/service.js

@@ -61,15 +61,15 @@ export default {
       },
     }),
   meetingName: () => Meetings.findOne({ meetingId: Auth.meetingID },
-    { fields: { 'meetingProp.name': 1 } }).meetingProp.name,
+    { fields: { 'meetingProp.name': 1 } })?.meetingProp?.name,
   users: () => Users.find({
     meetingId: Auth.meetingID,
     clientType: { $ne: DIAL_IN_USER },
   }).fetch(),
   groups: () => Meetings.findOne({ meetingId: Auth.meetingID },
-    { fields: { groups: 1 } }).groups,
+    { fields: { groups: 1 } })?.groups,
   isBreakoutRecordable: () => Meetings.findOne({ meetingId: Auth.meetingID },
-    { fields: { 'breakoutProps.record': 1 } }).breakoutProps.record,
+    { fields: { 'breakoutProps.record': 1 } })?.breakoutProps?.record,
   toggleRecording: () => makeCall('toggleRecording'),
   createBreakoutRoom: (rooms, durationInMinutes, record = false, captureNotes = false, captureSlides = false, sendInviteToModerators = false) => makeCall('createBreakoutRoom', rooms, durationInMinutes, record, captureNotes, captureSlides, sendInviteToModerators),
   sendInvitation: (breakoutId, userId) => makeCall('requestJoinURL', { breakoutId, userId }),