This PR takes The Bulldozer Approach (R): removes the old toolbox and lots of
associated code, though not all of it. Subsequent cleanups will follow.

Adds Nat64InfoModule which resolves IPv6 addresses for IPv4 addresses
in IPv6 only network where jitsi-meet deployment does not provide any
IPv6 addresses as ICE candidates.

* fix(info): bold info labels

* fix(info): do not truncate url

* feat(info): show only during a lonely call

* Align hint box text to center

* Fix disappearing hint box on android

Being kicked out of the conference will result with a conference failed
event with 'conference.kicked' reason and take the user back to
the welcome page by navigating to 'undefined'.

* ref(toolbar): add accessibility labels for torture tests

* squash: update propTypes

Electron generally can bypass having to get permission for
audio and video. In the case it doesn't have it, and the
permission screen is displayed, a string should still display
prompting the user to click allow. Right now the string id
displays.

This update is explicitly for FF screenshare and
gum retry fixes.

I don't understand the old showDesktopSharingButton action
but I've tried my best to copy it over. There is an existing
issue where the keyboard shortcut gets registered when it
probably shouldn't because screensharing is disabled. It will
be fixed soon with refactoring of the entire logic determining
whether or not to show the screensharing button.

This is instead of showing the button with a tooltip about it
being disabled.

The onPresence parsing was refactored to remove use of jQuery.
This exposed three methods not available in react-native:
ParentNode.children, ChildNode.remove, and
document.querySelectorAll. The querySelectorAll change could
be swapped for the already polyfilled querySelector, but
children and remove had to be added. The polyfills are based
on those supplied by MDN web docs, but modified to pass jitsi
linting.

The redux flows for video muting may not cover all cases
that the conference.js flows cover. Just exercise the old
flows to be safe.

The redux flows do not account for as many scenarios, such
as config.startWithAudioMuted being true.

* fix(toolbar): make darker for better text contrast

* squash: borrow some atlaskit colors

Reorganize calendar access request flow

* fix(invite): do not send empty queries for people search

The endpoint might return an error if an empty query is sent.

* fix(invite): add error logging for failed people directory requests

The error currently being passed through from $.getJSON ended up
being an empty string plus was not getting logged. So switch to
fetch to move along with jquery killing and log the error.

* fix(dial-in): add error logging for failed requests

* ref(invite): create a fetch helper to remove duplicate logic

* feat(invite): add basic analytics for AddPeople dialog

Analytics for opening the dialog, closing the dialog, the
count of invites sent, and the count of invites errored.

* squash: fix typo, change default count init, remove extra analytics param

Do not take legacy property into account if there's non-legacy value.