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

# Conflicts:
#	server/methods/sendForgotPasswordEmail.coffee

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

Conflicts:
	packages/rocketchat-lib/server/methods/saveSetting.coffee

#4121 models base.update throws error

Fix resize of message box on mobile when paste and send using `return` on keyboard

Disable unessary fields on push settings

Fix E-Mail address in reset password form is case-sensitive (#4158)

Smarsh Connector

* 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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Tweak SandstormOembed styling/format

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

livechat office hours

Slackbridge refactor