Create unique and reasonable initial identifier when a new dataset is created.

In metadata entry form, provide feedback of non-unique identifiers encouraging user to create conforming title.
Provide help text to:
  Encourage good dataset title indicating it is "set once".
  Describe dataset title rules for valid characters.
  Show meaningful example.

Test/Acceptance:

Try out datasets similar to existing ACADIS datasets as examples.
Test duplicate and similar dataset names.
User title is still meaningful after iteration.