chore: Pulled HTML5 locales - Aug 5, 2021

Add override locale support - guest wait page

Feat: added option to allow to use customStyleUrl from config

fix: override default locale api parameter

upgrade node-sass version

fix: handle case of freeJoin breakout with no users

fix: Re-subscribe user to guestUser collection on promotion/demotion

fix: Grant current-poll access to attendee presenter too

fix: Check for users before grabbing breakout url

fix: webcam resize - RTL languages

fix(audio): improvements in audio logging

Stop dictation when swapping languages with the voice recognition on

fix(guests): Propagate list of pending guests only to mods

fix(polls): Avoid viewer manually subscribing to current-poll

fix(breakouts): Do not allow users to obtain 'redirectToHtml5JoinURL' for others

fix: Add meetingId to chatIds selector

fix(common-web): Sub-processes hang if output buffers fill up

ExternalProcessExecutor spawned sub-processes with stderr and
stdout buffers, but did not read from those buffers. Sub-processes
producing output sometimes would fill up these buffers and then hang
until the timeout occurs and the process is killed.

This fixes #12839 (PDF conversion hangs for 10 seconds per page)
by properly discarding command output. The patch also deprecates an
outdated and dangerous API and offers a safer alternative. Splitting
command arguments based on whitespace may result in unwanted behavior
if an argument (e.g. a filename) contains whitespace.

this.recognition can be null

fix: ConnectionStatus - log info on 'warning'

Until now we only logged for `normal`, `danger` and `critical` leading to some ambiguity in log analysis