Closes #4177

Fix an exception occuring in the smarsh connector when a user didn't have an email, adds a setting to configure the default email for missing emails

Fix the generateEml throwing an error when the message type isn't defined and fix a conflict of the saveSetting.coffee being added back in when it was removed

* Remove double error trhow

* Fix channel name changed

* Fix not sending notifications for old messages

* Add option to silence adding users to room

* Silence adding existing users to room

* Add try/catch in set avatar to prevent timeout issues

* Save topic message in correct date/time

* Add logs

* add checks in the methods for checking if the data received in the parameters are in their correct type

* Put the checks in the start of the method and fixed some indentation

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Remove the "Click to open grain" text and make the title look like a
link.

Manual push by LingoHub User: Gabriel Engel.
Project: Rocket.Chat

Made with  by https://lingohub.com

This will send emails the configured email address with a table of all messages from all the different rooms, including direct messages.Each room will be a different email sent.
Files uploaded will be attached to the email IF and ONLY IF the uploads are to the database or the file system.