* Adds initial documentation for sipgw jibri.

Also explains enabling the people search service and the request/response that are made around sipgw jibri service.

* Fixes add people dialog to invite users and rooms.

No invitation is sent when there is nobody to invite.

* Reuse some recording strings, by using arguments.

* Make sure web also dispatches CONFERENCE_WILL_JOIN.

* Introduces new feature videosipgw.

* Fixes lint errors.

* Renames methods to use people, chatRooms and videoRooms.

* Updates to latest lib-jitsi-meet (dc3397b18b).

On DOMINANT_SPEAKER_CHANGED events, switch to the new
dominant speaker regardless of if the speaker has video;
it's okay to show the speaker's avatar.

Always switch to the dominant speaker after unpinning
instead of conditionally checking if the current dominant
speaker has video.

It was decided along with the mute participant dialog reactification
that these types of warning messages should not be toggleable--that
they should simply always display because there is no undo action.
As such, the component NotificationWithToggle is no longer needed.

* fix(notifications): throttle and batch join notifications

Instead of directly calling to show a join notification,
go through a specific method. This method will queue
names for display while a throttled function pulls
the names and shows a notification.

* squash: remove unused translation key

* squash: use default display name

* squash: move into participant actions

Refs: https://github.com/jitsi/lib-jitsi-meet/pull/648

It's possible for a track to be disposed but still on the redux store, before
the reducer removed it.

After looking at the jquery-ui documentation, I believe it
is being used only in one place, when toggling the smiley
menu. That toggling has been quickly replaced with a normal
jquery call.

Note: @atlassian/aui also uses jquery-ui but killing that
off will be more difficult due to its CSS being used.

Prepares for the latest eslint & flow-related npm packages which cause
these errors.

While having configuration-specific AppIcons may be of questionable use,
I'm more interested in using the Debug version for enterprise
distribution and the Release version for AppStore distribution.

Overflow on body was set to hidden, likely because of
various tricks used to hide elements off screen in the
SPA. Overflow hidden also has the benefit of hiding
scroll bounce when using a MacBook touchpad. The
welcome page is the exception that needs scrolling,
so style welcome page to scroll.

A couple others had made pull requests to addrses this issue
but there hasn't been follow up.

Click handling was added to the local thumbnail only after
receiving video. Click handling was added to remote thumbnails
only after receiving a stream. To allow for pinning through
the filmstrip in any case, always attach the click handler
on thumbnail init.

Checks exist when clicking a contact list to prevent the pinning
UI from updating if a remote thumbnail has not loaded video.
This was unexpected UX so instead go ahead and pin. This is
accomplished by having contact list clicks to more directly
trigger the flow of a thumbnail being clicked.

Rearrange the ToolbarButtons in the secondary Toolbar in order to mostly
group the media-related ones such as the AudioRouteButton, the
switchCamera button, and the audio-only mode button.

Due to the difference in nature, the iOS and Android implementations are
completely different:

iOS: MPVolumeView is used, which allows us to place a button which will launch a
native route picker provided by iOS itself. This view is different depending on
the iOS version, with the iOS 11 version being more complete.

Android: A completely custom component is used, which displays a bottom sheet
with the device categories, not devices individually. This is akin to the sheet
in the builtin dialer.

It emulates Android's BottomSheet in pure JavaScript. It's implemented as
another Dialog, so it can be used instead of one.

The implementation only supports text options with an associated icon, and an
optional 'selected' marker.

Now that we have package-log.json for the sake of reproducible builds,
we should lock CocoaPods as well.

We're already using the notion of _WILL_ in redux action types and
there's currently no compelling reason to introduce _BEGIN_ as well.

While reviewing "[PREVIEW|RN]: Handle getUserMedia in progress" I
discovered JSDoc comments which could be improved. They are not
necessarily 100% related to the PR.

This commit adds extra actions/Redux state to be able to deal with
the GUM operation being in progress. There will be early local track
stub in the Redux state for any a local track for which GUM has been
called, but not completed yet.

Local track is considered valid only after TRACK_ADDED event when it
will have JitsiLocalTrack instance set.

chore(deps): update package-lock and package.json

The YouTube api removed player#getVideoData years ago.
I am completely baffled as to how the feature kept working.
The title of the video is no longer obtainable through
the player itself, so instead call the bot participant
"YouTube."

That standalone ButtonGroup package has been deprecated.
The deprecation warning says to use the ButtonGroup component
from the Button package.

* feat(keyboard-shortcuts): show help in a react dialog

- Move shortcut help dom declaration to a react component
- Let open/close logic be handled by AtlasKit Dialog
- Remove static html for help from index.html
- Consolidate keyboard shortcut css

* squash: use lozenge for key styling

* squash: use different iteration style

* squash: update package-lock for lozenge

* feat(audio-only): be able to lock a browser into capturing audio only

* squash: try to make string more clear about audio only support

* squash: final strings

* fix(remote-mute): Moves remote participant mute to react

* fix(translation): Removes unused strings

* [squash] Addressing comments

fix(analytics): use string concatenation for ie11