Migrate livechat visitors' emails field to visitorEmails

Fix bot users being rate limited

Fix unset emails field if none set instead of name field

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

Add room setting which allows reacting when read only

Merge branch 'karlprieb-form-elements-redesign' of github.com:RocketChat/Rocket.Chat into karlprieb-form-elements-redesign

LingoHub based on develop

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

Made with  by https://lingohub.com

Show the reaction button on the action buttons. Also, fix a bug that would allow you to react to private messages only

Fix color issues

Remove reactions when messages are removed, fixes #5164

* fixes channel creation test failing

* forgot to remove .only from test