* Fixes some toolbox/toolbar styles and variables

* [squash] Fixes variable name to fit better its purpose

* [squash] Fixes secondary toolbar variable name

With the upgarde of @atlaskit/icon to 7.0.0, the size prop
essentially became required to maintain its appearance in the
jitsi app, otherwise it'll unexpectedly try to take up the
available space and cause minor display issues.

The speakerStatus field already exists as part of the objects
in the participant reducer. When the library updates the
connection status of a user, plumb that update through to redux.

ref(stats): process stats through one pub/sub

Module poltergeist update

fixes handling of keyserver ASAP validation of tokens
wraps room and room-size APIs

set up async context for all poltergeist calls
utils lib now has async wrapper for event handlers

config: document enableFirefoxSimulcast

fix(connection-indicator): rename calls to hiding the indicator

Instead of passing stats through UI then VideoLayout then the
SmallVideo, pass stats directly to what uses it--ConnectionIndicator.
This also bypasses adding the stats to the store, as they do not
seem to be something that needs to be shared or stored app-wide
just yet.

navigator.product is read-only, so we don't run into the risk of it being
changed.

This was already an implicit requirement, as it's the only version implemented
in libwebrtc.

The reason to add this is to (defensively) try to filter old devices which may
not implement it.

WebRTC's own Android demo app defines this.

The end goal of this patch was to avoid opening the camera when there is no
welcome page.

In order to achieve this, the logic for creating the local tracks was
refactored:

Before this patch local tracks were created when lib-jitsi-meet was initialized,
and destroyed when it was deinitialized. As a side note, this meant that when a
conference in a non-default domain was joined, local tracks were destroyed and
recreated in quick succession.

Now, local trans are created and destroyed based on what the next route will be,
and this happens when the target room has been decided. This allows us to create
local tracks the moment we need to render any route, and destroy them when there
is no route to be rendered. As an interesting byproduct, this refactor also
avoids the destruction + recreation of local tracks when a conference in a
non-default domain was left.

If we do not reuse previous presences we lose avatar and name and people joining after the poltergeist creation will not be updated with those values.

Add config.startScreenSharing

The full-screen module uses the HIDE_DIALOG action to re-engage the full-screen
mode.

Adds http method to remove poltergeists. Adds configurable timeout after which poltergeists automatically are removed from the room.

The functions need not return anything, or it will be dispatched as another
action.

module-poltergeist

If there will be microphone error it will cover any screensharing
dialog, but it's still better than in the reverse order where
the screensharing dialog will sometime be closing the microphone alert
($.prompt.close(); is called).

Will try to use screensharing instead of camera video from
the beginning.

Make 'createInitialLocalTracksAndConnect' not static.