StudentQuiz 3.2.3

• students will be informed about data loss, when they try to navigate without saving their comment
• comment list is now chronologically descending, retain their formatting (and newlines), are now below the navigation and longer before the "show more" button appears
• improved the display of the question table and the sidebar in the overview for smaller screens
• A lot of various fixes and improvements to help integrate StudentQuiz into moodle core, see MDL-62822(https://tracker.moodle.org/browse/MDL-62822), almost all of them are not visible to the users
• fixed attempt calculation when questions got deleted