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outdated and dangerous API and offers a safer alternative.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

fix: avoid leaving dangling HTMLMediaElements in paused state (#12806)

Should fix an issue with the recent Chrome 92 intervention that limits
the number of concurrent WebMediaPlayers (an inner element of
HTMLMediaElements) to 75/40.

Webcam video elements were being left dangling in paused state despite
the elements themselves being cleaned up from the component. That
generated a skewed accounting of WebMediaPlayers in the session.

Initialize the start/stop dictation button when speech recognition stops after some silence (#12783)

* Update component.jsx
* Update en.json

the speech recognition can stop due to the incompatibility of browser as well.

Inform users that meeting ended due to "endWhenNoModerator"

fix(audio): add secondsToGatherIce as extraInfo in server log

fix: Unlocking specific user doesn't unlock all options to him

fix: left/right webcam drag & drop for RTL languages

Get locale value from settings in export usernames

Fix URLS for bigbluebutton.org

Fix race condition in auth process

 fix(audio): audio modal inactive after connection error 

chore(audio): add audio join time in extraInfo of server log

Fixes poll option misalignment in mobile device

fix(audio): prevent mute notification to be triggered when mic is locked

When mic is locked, user is not able to talk so it doesn't make sense
to alert the user about unmuting (mute button is also disabled when mic
is locked).

Closes #12048