Currently all.css is loaded after app.js. This means there may
not be a guarantee that the css is loaded before the js, which
is bad because the js does dom querying for sizes on elements,
but some element sizes will be affected by js. So instead load
css upfront and let the browser block as needed or at least
give the css a head start in racing javascript to load.

- Modify Etherpad and SharedVideo so their resizing takes into account
  the width of the filmstrip in vertical filmstrip mode.
- Modify Filmstrip's getFilmstripWidth to account for when the filmstrip
  is hidden.
- modify VideoContainer so in vertical filmstrip mode it centers the
  shared desktop stream in the middle of the available space not taken
  by filmstrip.
- Also allow clickthrough on the secondary toolbar itself while still
  allowing clicks on the toolbar's buttons. This allows clicks on
  shared videos to go through.

Rounded corners on the first and last buttons. Size of the hangup button
on hover.

Something is causing firefox to show scrollbars on the remote videos
container even though there is plenty of room. I lost this battle
and just made the container taller...

Using column-reverse prevents proper scrolling on browsers other than Safari
and Chrome. Additionally, Firefox has an issue where flex containers have
dimensions set to auto, preventing resize. So, add hacks to maintain Chrome
and Safari's behavior while allowing for some kind of scrolling on other
browsers.

The goal is to reduce usage on atlassian/aui. New components
have been created to display the settings panel. Language
selection will reach into i18n for state whereas moderator
options will keep state in redux.

Properly handle errors while connecting or joining a conference. Prior to this
patch, only errors on established conferences / connections were saved to the
redux store.

Don't wait for the connection to be made, since in some cases, when auth is
rquired, for instance, that won't happen until the user inputs their
credentials, but the dialog would be overshadowed by the overlay.

75bf7638b3 introduced this regression, state must
be assigned as an object, even though one would think it's automagically
initialized to an object. Oh well!

feat: add more accessibility labels

AtlasKit is not fully compatible with React 16. One problem
is PropTypes will not be defined on the React object. So,
add the prop-types shim to the popup bundle.

Adds more accessibility labels required for mobile automated testing.

These modification are not necessarily directly related to the
containing PR, I merely saw them while reviewing the containing PR.

Do the selection in mapStateToProps so the container itself doesn't need to
receive all the props that each overlay needs.

Each overlay is responsible for fetching their own props and for providing a
"needsDisplay" static method wich will be called with the full redux state and
should return true if the overlay needs displaying.

Also eliminate duplicated state keeping: the connection and conference error
states can be fetched from their respective base features.

* On adding participant show the initial status text if any.

When participant joins and there is an initial status we show it, instead of the connected notification. If initial status is missing proceed with the default user connected notification.

* Updates to latest lib-jitsi-meet (365bd886ee).

* Adds a fixme comment.

* Updates to latest lib-jitsi-meet (365bd886ee).

* feat(notifications): prioritize based on type (appearance)

* squash: add return description to doc

ref(overlay): convert progress bar to react

Updates to latest lib-jitsi-meet (1c743d65ee).

npm: Updates lib-jitsi-meet to dc3397b18b.

Initializing UI features, like keyboard shortcuts, by chaining
onto APP.conference.init is not safe because init can fail,
skipping the initializing of UI features. This can happen when
the room is locked and then a failure event is dispatched into
middleware. I couldn't find a place to properly chain onto
in the APP.conference.init promise chain, primarily due
to the flow continued within middleware, so instead I
leveraged an existing listener for CONFERENCE_JOINED.

* 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.