Merge branch 'improvements/2fa-implementation' of https://github.com/RocketChat/Rocket.Chat into improvements/2fa-implementation

# Conflicts:
#	.sandstorm/sandstorm-pkgdef.capnp
#	.snapcraft/edge/snapcraft.yaml
#	.snapcraft/stable/snapcraft.yaml
#	HISTORY.md
#	package.json
#	packages/rocketchat-lib/rocketchat.info

* Add ESLint rule `prefer-template`

* Add ESLint rule `template-curly-spacing `

* ESLint ignore rocketchat-livechat/assets/rocket-livechat.js

* Add ecmascript package to all packages

* Use ecmascript package for server and client on saml package

* Fix compilation

* ESLint add rule `object-shorthand`

* ESLint rocketchat-livechat/assets/rocket-livechat.js

* Add ecmascript package to all packages

* Use ecmascript package for server and client on saml package

* Fix compilation

* Add eslit rule `one-var`

* ESLint add rule `no-var`

* Add ecmascript package to all packages

* Use ecmascript package for server and client on saml package

* Fix compilation

Add ESLint rule `one-var`

* conversion [WIP]

* wip

* last coffee files in sidenav converted

* fix eslint

* Update sideNav.js

* Update sideNav.js

* Update package.js

* userEdit.coffee to js

* fix the wrong merges

* Update userEdit.js

* Update package.js

* Allow access to the models within integrations and fix a few issues with incoming webhooks

* Update the history file to reflect the changes to the integrations

* convert sidenav Coffeescript to Javascript

* fix no unused vars

* WIP: allowing visitors to switch to a different department (RocketChat/Rocket.Chat#5998)

* Does not make much sense to read the global variable

* set the department id when switching

* Add confirmation when switching departments

* fixed eslint issues

* moved switching of department to its own screen

* Added option for admin to allow visitors to switch department (default is yes)

* fixed eslint

* Improve livechat switch department UI/UX

* fix livechat widget on small screens

* fix body style and scroll

@RocketChat/core

This PR allows livechat managers to transfer chats. Right now, only the active agent is allowed to do that. 
Sometimes, those people forget to forward it and just leave it open and it's easier for the manager to simply forward it to someone else than having to ask the active agent to do it.

* focus first textbox element

* Empower esc key.

* Eslint globals.

* added a callback to slashcommands

* if the channel exists the command join acts as open command

* test if the slashcommand has a result callback

* join-command braces fix

Close #6416

* send reset password email required

* Make the reset password toas message more clean

* fix the wrong commit

* Fix indentation