"Manage" option vanished on portal for Azure SQL database
The manage button is no longer available for V12 SQL databases on Azure. Official response from support engineer at Azure:


  The Manage button is not available on Azure SQL Database V12. It is
  only compatible with the previous version of azure SQL Database, V2
  (or V11). With the new database that you created, you may use either
  Visual Studio, or SQL Server Management Studio to manage them.