Fixes unpinning local user which is dominant speaker.

If we:
 - pin a remote and click it, unpin is signalled.
 - pin a remote and the click another remote, the new one is pinned and signalled.
 - pin a remote and then click local. UI pins local, but unpinning remote is not signaled, fix addressed with this commit.
 - pin/unpin local, nothing is signalled.

Makes close button non-focusable.

It was not switching and staying on local video on unpinning, after change the last shown video will be used to switch to it.

Prevents the close button to take focus while user clicks tab in the page, which will privent the toast to be closed.

Fix popover

Removes click handlers when popup is hidden.

feat(Analytics): Multiple analytics handlers support

In preparation for and as another early step in rewriting the Web
version of jitsi-meet using React, use Haste resolver which is able to
distinguish among platform-independent files, Web-specific and
mobile-specific ones.

Additionally, (1) make sure that Babel is capable of understanding React
files and (2) introduce React as a dependency.

The purpose is to repeatedly take small steps towards our goal and merge
them before they get in conflict with the separate ongoing advancement
of the Web version of jitsi-meet.

fix: replace robohash avatars with adorable io

Fixes issue with not resizing properly if SS is on and the filmstrip is hidden

Removes unused css classes

Chat animation fix

link class added

Fix some ui bugs

fix: Firefox desktop sharing extension required dialog

Thumbnail avatars

Fix visual bugs in sidebar

Stop the media when XMPP connection is dropped