* Adjust chat font size.
* Adjust invite more button and text size.
* Remove useless constant.

* ensure keyboard stays open when sending messages on mobile web.

* Add buttons to send messages/set nickname.
* Redesign message/nickname inputs.
* Pin messages to the input.
* Add keyboard avoider for Safari.
* Make chat content scrollable on mobile.

* Fix toolbox buttons not displaying properly when chat is open.
* Open chat in fullscreen dialog past custom thresholds when mobile/desktop toolbox would become unusable due to chat
* Remove mobile chat check when displaying toolbox

- allow managing chat through API when chat button is not present on UI

We stopped providing a way to set them, so don't render them either.

Also cleanup some leftover config options.

* feat: Drops filmStripOnly mode.

* squash: Let's make lint happy again.

* squash: Drop some css.

call TOGGLE_CHAT action when chat modal is closed to correctly update chat isOpen state

Up until now we relied on implicit loading of middlewares and reducers, through
having imports in each feature's index.js.

This leads to many complex import cycles which result in (sometimes) hard to fix
bugs in addition to (often) breaking mobile because a web-only feature gets
imported on mobile too, thanks to the implicit loading.

This PR changes that to make the process explicit. Both middlewares and reducers
are imported in a single place, the app entrypoint. They have been divided into
3 categories: any, web and native, which represent each of the platforms
  respectively.

Ideally no feature should have an index.js exporting actions, action types and
components, but that's a larger ordeal, so this is just the first step in
getting there. In order to both set example and avoid large cycles the app
feature has been refactored to not have an idex.js itself.

- Invite funcionality (altogether)
- Recording
- Live streaming
- Meeting name
- Meeting password

react-emoji-renderer 1.0.0 removed the
thumbsup and thumbsdown aliases.

* Removes unused translations.

* Fixes using translated strings.

* Moves using latest i18next versions and stop using compatibility modes.

* Sorts i18next options.

* Fixes defaultNS used by i18next.

This is used when translating html tags with data-i18n keys as attributes, used by jQuery-Impromptu.