* Update Portuguese translation

* Small fix in the translation

* Add new update

* feat(audioOnly) translation

* chore(welcome-page) translation

* translate "noMicPermission"

Avoid modifying the iframe. We don't really need to bubble up mouse
events anymore since the Etherpad frame won't overlap with the toolbar
or filmstrip, so when the user moves over those areas it will just show
up.

Brings back Metal rendering and other SDP negotiation improvements.

Convert some files to TS
Move some styles from SCSS to JSS
Update design

Fix local recording saving not working after IFrame sanbox introduciton. The allow-downloads flag was missing.

Convert files to TS
Move styles from SCSS to JSS
Implement redesign

Ref: https://github.com/jitsi/jitsi-meet-electron/issues/837

Use a fixed set of remote tracks for a call based on the ssrc-limit set in jvb config. When this feature is enabled, JVB will signal the audio and video SSRCs and their owner/endpoint info using a bridge channel message. For audio, the mappings are determined based on the energy rankings on the audio sources present in the call and for video, the mappings are calculated based on the video sources the client requests through the video receiver constraints.
Remote tracks are then created/remapped by the client based on these mappings.

* Added track_owner_changed action
* Skip track-based large-video selection in rewriting mode.
* Register OWNER_CHANGED handler at track level.
* feat(participants) Add source info to participants in redux.
With ssrc-rewriting, the receiver constraints need to be generated using the source info received in presence. Currently they are generated from the track info in redux but with ssrc-rewriting, remote sources are not signaled and therefore created until they are being requested through receiver constraints.

Co-authored-by: James A <jqdrqgnq@users.noreply.github.com>

https://github.com/jitsi/lib-jitsi-meet/compare/v1577.0.0+5713cb0d...v1578.0.0+5855ca72

https://github.com/jitsi/lib-jitsi-meet/compare/v1574.0.0+4d6873c2...v1577.0.0+5713cb0d

Move some styles from SCSS to JSS
Convert some files to TS
Implement redesign

Update title bar button: ParticipantsCountLabel -> SpeakerStatsLabel. Only show button when speaker stats is enabled
Add badge to the participants pane button to show participants count

These are used by the Electron app to open links in the chat, for
example.

Make sure the ifrme is fully configured before setting the source URL
and thus triggering the load.