test the right function and improve error handling
refactor ontology delete view, use i18n and modal
add missing parenthesis
Revert "Use active scope for retrieving repositories."

This reverts commit d053813dcf22b74cded34daf5734e54388e9bee6.

Conflicts:
	app/controllers/home_controller.rb
	app/controllers/ontology_search_controller.rb
	app/helpers/application_helper.rb
	app/models/repository/destroying.rb
Add scopes and default scope, adjust migrations.
Fix errors introduced by default scope.