Anton/sync groups and verticals

This fixes https://openedx.atlassian.net/browse/BLD-1095

NB: before merge `ENABLE_GROUP_CONFIGURATIONS` should be set to default value.

Please review: @tymofij  @cahrens 
>I encourage you to look for a design that doesn't rely on storing the name in two different places and keeping them in sync.

What do you mean by second place? That vertical display name is not updated and saved anywhere else.