Project preferences - Customizing interfaces per model with default attribute sets

[mjy]

Blocker/dependency of full #377

As a user I want to select Predicates and assign them to class sets. These predicate sets will appear as blocks in the forms/tasks that use them.

• Preferences can be set by a project admin or admin
• Data is stored in Project(?)#preferences:

  'model_predicate_sets':  
    'Otu': [1,2,3]
    'CollectingEvent': [4,5,6]

In this case 1-6 are the IDs of Predicates.

• We need a new task to build the assignments. Hard code the list of models that can make use of these sets in interfaces (at present CollectionObject and CollectingEvent).
• Select model
• Smart select predicate? Or just show all and let user select into list.
• Include a link, or modal popup to create Predicate inline.

[mjy]

[mjy]

Variable should be available in Project.

[jlpereira]

Done