Case Study can be related to worldwide priority
Test should_allow_association_with_worldwide_priorities

Conflicts:
	test/functional/admin/case_studies_controller_test.rb
Display case studies under a priority

nb: styles on the list are inherited from mainstream which should be
fix soon

Conflicts:
	app/models/worldwide_priority.rb
	app/views/worldwide_priorities/show.html.erb
Fix partial calls

bad cherry-picking
fix partial and relation
fix partial
Add other assoications to wwp
Adding admin form for association to wwp
remove duplication
move this up as it gets lost under nation_fields