Samigo: For File Upload questions, add an upload confirmation on submission screen

Create an assessment with at least 1 file upload question Publish the assessment As a student, submit the assessment, adding a file to the file upload question Ensure the confirmation area displays what file titles were added to the assessment. Other tests: Check nothing is displayed if there are no uploaded files in the submission. Check deleted files (files that were uploaded and then removed, even after browsing through the questions) don't appear in the final list. Do two consecutive submissions, check the list is from the last one.