Add message when teams and lists are empty

There are no any messages in Settings -> Teams and Settings -> Lists.
There is no any idea what 'teams' setting means. Maybe you should add some description for this setting.

https://scr.4xxi.com/cu/Lists_2020-03-02_6_PM-23-50.png
https://scr.4xxi.com/cu/Teams_2020-03-02_6_PM-24-03.png