Change browser detection library to bowser

Improvements in muted banner

Fix localization of heading in presentation uploader

Fix: making allowModsToUnmuteUsers=true work again

When listen only fallbacks from Kurento to FreeSWITCH, we must guarantee
the muted alert won't be created, speciallly because listen-only's fallback
uses a flow similar to microphone's. Client currently crashes when this
happens: this commit fixes this peoblem.

We now stop the MediaStream (cloned/dummy input stream) when this is not
needed anymore.
We don't create/clone a new MediaStream when it already exists.
Fixed eslint warning in muted-alert/component.jsx

Update and some improvements on PR #10129 - dynamic change audio device 

Different colors for the selected User Response poll button

Revert "Change browser detection library from browser-detect to bowser"

Config overlay for bbb-web turn server config

Change browser detection library from browser-detect to bowser

Enhancements to presentation OfficeToPDF conversion

Rework banned users

Updated release to 2.3.0-beta-2

Enabled by default Shared notes in 2.3

Packaging already replaces `url: ETHERPAD_HOST` so it should be safe to have `note:enabled: true`

Mobile video dropdown size

* WIP adding whiteboard special user access test spec

* Adds additional user whiteboard access test spec to whiteboard.obj.js

Improve guest lobby feedback

Included a message and a redirect for the cases where the guest is
not allowed to join or the meeting has expired/ended.

Setting this as default to prevent bad UX: device selector is currently small
for mobile devices

This could be added as a config in future

By default this is set to true, allowing users to dynamic change audio devices
Fixed a few linter warnings

Allow listenonly users to change output devices
Fixed dynamic audio device change for firefox
Fixed shortcuts for audio join/leave
Show (with a bold font) the current selected device
[performance] Prevent calling mediaDevices.enumerateDevices every time we render
the selector. This adds a delay (~200ms, on my chrome setup) to render this component
[performance] Do not call enumerateDevices to search for new devices, instead we listen on mediaDevices.deviceChange event
Small refactoring and fixed a few errors that were being throw in browser's console
Fixed device selection when this is done in audio-settings modal
Fallback to default device when current device is removed
Truncate device name length
Renamed "Input","Output" labels to "Microphone","Speakers", respectively
Update eslint rule for accessKey

Fix actions bar buttons overlapped by right side

Adds a customizable "office to pdf" converter for presentations