MDL-37454 Add core support for activities other than labels to display contents inline
MDL-37455 Allow mod_folder to display the content inline on course page instead of on separate page
MDL-32474 Wikimedia returns more information about images
MDL-37454 instead of checking that it is label we check that activity has url
MDL-33774 mod_label stores the content where it is supposed to

removed hardcoded checking for 'label' module type
TODO labels and has_view()