event: not display fields label if the field is empty

ActionItem3106
Update schema version
Migrate from old attribute name
Add missing scope
Merge branch 'stable' of https://gitlab.com/noosfero/noosfero into distribution-plugin

Conflicts:
	app/views/catalog/_products.html.erb
	plugins/shopping_cart/controllers/shopping_cart_plugin_controller.rb
	plugins/shopping_cart/test/functional/shopping_cart_plugin_controller_test.rb
	plugins/shopping_cart/test/functional/shopping_cart_plugin_myprofile_controller_test.rb
	plugins/shopping_cart/test/unit/shopping_cart_plugin_test.rb
	test/functional/catalog_controller_test.rb
Merge branch 'distribution-plugin' into cirandas

Conflicts:
	app/views/catalog/_products.html.erb
	plugins/shopping_cart/controllers/shopping_cart_plugin_controller.rb
	plugins/shopping_cart/test/functional/shopping_cart_plugin_controller_test.rb
	plugins/shopping_cart/test/functional/shopping_cart_plugin_myprofile_controller_test.rb
	plugins/shopping_cart/test/unit/shopping_cart_plugin_test.rb
Put back controller
Fix empty cart
Merge branch 'distribution-plugin' into cirandas