Optimize and correct views for Safari users
Lecturers predominantly have an iPhone or Mac. They will use Safari on both devices. In Safari, some icons will be truncated (see Save icon for direct link) and filtering the questions won't work.
When calling the app, check if Safari is used on the Mac. If so, tell the user in the snack bar to use Chrome or Firefox.
In a Safari, Chrome, or Firefox on iOS devices, do not display the filter icon.