Show an overlay with a spinner when slow gUM is fired

* Add buttons to send messages/set nickname.
* Redesign message/nickname inputs.
* Pin messages to the input.
* Add keyboard avoider for Safari.
* Make chat content scrollable on mobile.

When there's no jitsiTrack set on the base/tracks entry it means
a track is being created (get user media is in progress).

Introduces a new feature flag ('help.enabled') and uses that to
determine the visibility of the 'Help' button in a call.

Fixes: https://github.com/jitsi/jitsi-meet/issues/8510

This basically reverts
a3fb996ff0
while retaining the same properties that prompted it's original intent, namely
avoiding sending the Referrer header.

* feat(conference): Enable forced reload of client on bridge failure.
Force the client to reload when the bridge that is handling the media goes down.
This mitigates issues seen on the bridge because of a client re-joining the call with the same endpointId, BWE issues, etc.
This behavior is configurable through 'enableForcedReload' setting in config.js.
The client skips the pre-join page when the page reloads.

* squash: refactor the restart logic.

* squash: fix description

* squash: dispatch conferenceWillLeave action before reload.

* feat: add ipados list of Platform.OS

* Create generic tooltip wrapper for mobile usability.
* Change overflow menu icon/font/padding sizes.
* Change overflow drawer expand icon.

* send meeting uuid to rtcstats

* change ret description

* fix flow error

* update lib-jitsi-meet version

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.