Open H5P file from H5P activity when it was added as a reference

The issue is covered with unit tests. However, some manual tests should be done too in order to check the new link is displaying the expected content (because it's displayed in a new window).   Setup  Login as admin. Create a course. Access to the content bank and upload the attached H5P file.   Testing scenario Add a new H5P activity to the course. Fill in the name field. In the "Package file" field, open the file picker, access to the "Content bank" repository, pick the file you've uploaded previously, select "Link to the file" option and click the "Select this file" button. Check the following message is displayed bellow the "Package file" field: "Use the content bank (opens in new window) to manage your H5P files" Check a new window is opened with the main page of the content bank. Save and display. Edit the H5P activity. Check the following message is displayed bellow the "Package file" field: "Access the H5P file in the content bank (opens in a new window)" Follow the "Access the H5P file in the content bank" link. Check a new window is opened, displaying the content in the content bank. Edit this content (for instance, you can add some text to the "Intro") and save changes. Switch to the main window (the one with the H5P activity form) and save changes. Check the H5P activity contains now the changes done in the content bank.