Merge branch 'feature-mime-types-management' into 'master'

app/assets/javascripts/management/object_types.coffee

app/assets/stylesheets/management/object_types.scss

app/controllers/management/mime_types_controller.rb

app/controllers/management/object_types_controller.rb

app/helpers/management/object_types_helper.rb

app/models/mime_type.rb

app/models/object_type.rb

app/services/safe_object_type_destroy_service.rb

app/views/layouts/management.html.erb

app/views/management/mime_types/_form.html.erb

app/views/management/mime_types/edit.html.erb

app/views/management/mime_types/index.html.erb

app/views/management/mime_types/index.json.jbuilder

app/views/management/mime_types/new.html.erb

app/views/management/mime_types/show.html.erb

app/views/management/mime_types/show.json.jbuilder

app/views/management/object_types/_form.html.erb

app/views/management/object_types/edit.html.erb

app/views/management/object_types/index.html.erb

app/views/shared/management/_nav_menu.html.erb