* audio only screen share implementation

* clean up

* handle stop screen share from chrome window

* update icon

* Unify chat open/close size changes and move them to redux.
* Fix responsive columns not accounting for chat.

* add option for disabling join/leave sounds

* document disableJoinLeaveSounds and add it to whitelist

Found via `codespell -q 3 -S ./lang`

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

The majority of the code is in the WASM file and models, this is just a few KB.
It's so little, in fact, that the performance hint for the main bundle didn't
have to be adjusted.

Do not add the muted audio tracks to peerconnection until the user unmutes the first time. This applies to startSilent, startWithAudioMuted and startAudioMuted/startVideoMuted config.js settings.

The error object changed its shape through time, adapt to the change.

It does a more elaborate way of textarea copying, hopefully it's more reliable.

* Update dateUtil.js

* version up moment

* exclude unnecessary languages in Moment.js from webpack

* add Occitan of Moment.js

* Fixed auto-formatting

* add require missing by mistake

Also unify the mobile and web features into one, even though internally they still have separate ways to enable the functionality.