Features flags added:  
-tile-view.enabled
-filmstrip.enabled
-notifications.enabled
-toolbox.enabled

* Implement opening toolbar and participant overflows as drawers when below certain width.
* Fix dial-in copy button displaying incorrectly.

feat(external_api) exposes more events from JS to native and adds the ability to send actions from native to JS.

Co-authored-by: Saúl Ibarra Corretgé <saghul@jitsi.org>

Fill must be properly specified.

* Expose raise hand event to external application

* Fix linting issues

* fix the app non existing issue

We were not processing properties which are set (fire properties updated) before the conference joined event is fired.

* Add option to open Etherpad on join

For sites that focus on collaborative editing during meetings, add
an option which, when set, will automatically open etherpad when a
participant joins.

* Add openSharedDocumentOnJoin to config whitelist

This also adds some config file doc comments about the option,
including a note about the choice not to honor it in the mobile app.

This reverts commit 6f90458ff1.

* feat: Exposes a method for checking is remote track received and played.

Used for some tests in torture.

* squash: Drop not matching string.

Duplicate translation key with not matching content.

* squash: Moves torture specific functions to features/base/testing.

Listens for media events from the video tag of the large video and stores them in redux.

* squash: Fix comments.

* feat: Listens for media events from the video tag of the remote videos and stores them in redux.

* squash: Fix undefined videoTrack if between switches.

Helps with testing turn relay cases.

While the base URL remains configurable, this patch reverts back to using
Gravatar.

We noticed high latency with libravatar and contacted them. They are in the
process of migrarting to a better infrastructure (it's a single personal server
at the moment) so we'll re-evaluate once that has happened.

As for why not leave the default and change it on the meet.jit.si installation,
we don't want to kill their server :-)

If limitLastN values are specified and channelLastN < limitLastN, configure channelLastN on the conference.

Also, default to libravatar.

Closes: https://github.com/jitsi/jitsi-meet/issues/4927

We stopped providing a way to set them, so don't render them either.

Also cleanup some leftover config options.

* feat: Drops filmStripOnly mode.

* squash: Let's make lint happy again.

* squash: Drop some css.

Fixes: https://github.com/jitsi/jitsi-meet/issues/7900

It has been `true` for a very long time.