feat(guests): notification settings

feat(recording): record role change event

refactor(recording): recording ready url callback

fix: export poll chat message

Merge branch 'poll-question-refactor' of https://github.com/germanocaumo/bigbluebutton into poll-chat-export

Avoid showing the guest's notification toggles at client's settings if the guest
policy isn't `ASK_MODERATOR`.

Reuse `ParticipantStatusChangeEvent` record event, already used by emojis and
webcam streams, to record `UserRoleChangedEvtMsg`.

Role change is stored at `events.xml` as:

- promotion
```
  <event timestamp="2068340" module="PARTICIPANT" eventname="ParticipantStatusChangeEvent">
    <timestampUTC>1622384175759</timestampUTC>
    <date>2021-05-30T14:16:15.759Z</date>
    <status>role</status>
    <userId>w_fowyht7g0tfi</userId>
    <value>MODERATOR</value>
  </event>
```

- demotion
```
  <event timestamp="2071437" module="PARTICIPANT" eventname="ParticipantStatusChangeEvent">
    <timestampUTC>1622384178855</timestampUTC>
    <date>2021-05-30T14:16:18.855Z</date>
    <status>role</status>
    <userId>w_fowyht7g0tfi</userId>
    <value>VIEWER</value>
  </event>
```

Minor update to test build

Fetch for server's security salt at etc's bbb-web properties file.

Include the new poll text in the chat export function.
Refactor some chat type constants.
Also fixes empty lines in the export chat file.

fix: translate poll answer key for default polls in chat message

refactor(poll): improve poll types code

this also fixes certain poll type detection for other languages than english,
so that the correct poll type is sent in the events (they were being detected as custom)

refactor: redo how poll result chat message is done

* adds unability to see screenshare button on mobile devices test specs

* simplify code in testMobileDevice()

* userlist and chat panels should not appear at page load in mobile devices

* lint

* updates outdated audio specs due to leaveAudio changes

* correct clicks on disconnectAudio elements

* whiteboard not visible on userlistPanel or on chatPanel

* reworks mobile devices/usersagents

* fixes screenshare mobile/tablet specs

* adds whiteboardNotAppearOnMobile spec

* adds Chat Panel specification to Mobile-Tablet specs

* simplify getArgs() functions for all devices

fix: add padding to action bar dropdowns

Show the status of multiple nodejs workers and kurento media servers in bbb-conf status

feat: localization support for guest wait page

fix: handle additional cases for locales

refactor: removing unused imports/exports

fix: do not display private chat before first message is sent

fix: remove git add from linter config

fix: don't show empty line when poll have 7 answers