Show type selector when adding a new field

[Luke Van In]

• The data type must be selected before a new field entity is created.
• The UI should reflect the type of data being created.
• The data should be checked for conformance when the data is entered.
• UI features should match the data being entered.

Types of data:

• Person (Faces, Names, Roles, Departments)
• Organisation (Name, Logo)
• Phone number
• Email
• URL
• Network account (service, account name, public URL)