React Native doesn't define __filename nor __dirname so do it artisanally. In
addition, this helps with centralizing the configuration passed to loggers.

* Adds dial in default number and pin to the text for calendar/share.

* Handles fail to fetch numbers or conference id.

* Implements calendar entries edit.

Share text generation between calendar-sync and the share-room feature.

* Fixing comments.

* Clone the event element we modify on update.