* [WEB] add UI for transcription
* add analytics event for button, do not use global APP object
* use props instead of state, use local conference to kick participant
* put imports in alphabetical order
* add translation for TranscribingLabel
* fix merge conflict
* add closed caption button
* purge OverFlowMenuItem which starts and stops Transcription
* readd closed caption icon and fix small issues due to purge
* delete unused icon in _font.scss
As an intermediate step on the path to merging jitsi-meet and
jitsi-meet-react, import the whole source code of jitsi-meet-react as it
stands at
2f23d98424
i.e. the lastest master at the time of this import. No modifications are
applied to the imported source code in order to preserve a complete
snapshot of it in the repository of jitsi-meet and, thus, facilitate
comparison later on. Consequently, the source code of jitsi-meet and/or
jitsi-meet-react may not work. For example, jitsi-meet's jshint may be
unable to parse jitsi-meet-react's source code.