Add better multisupport to the H5P WordPress plugin
The H5P WordPress plugin is currently not optimized for use on a WP multisite network. Instead of simply network activating and installing a single set of libraries for H5P content throughout the network, the plugin must be left network inactive and individually activated on each site on the network, and the needed libraries are installed repeatedly for each site using H5P. We'd like to see a scenario in which the H5P plugin can be activated on a multisite network, at which point a single instance of the necessary libraries is installed and a shared H5P activity library is created for all sites on the network to use (the multisite behaves like a single supersite, essentially). See https://github.com/h5p/h5p-wordpress-plugin/issues/41 for earlier discussion of this request.