Merge pull request #1650 from RocketChat/turn-off-livechat

...ages/rocketchat-livechat/app/client/stylesheets/main.less

packages/rocketchat-livechat/app/client/views/messages.js

packages/rocketchat-livechat/app/client/views/room.html

packages/rocketchat-livechat/app/client/views/room.js

packages/rocketchat-livechat/app/i18n/en.i18n.json

packages/rocketchat-livechat/assets/rocket-livechat.js

packages/rocketchat-livechat/config.js

packages/rocketchat-livechat/i18n/en.i18n.json