added aria-label text for icons on the profile page, fixes #4046

Closes #4046

Merge request studip/studip!3047

(cherry picked from commit d28f3aff)

5f0d9a73 added aria-label text for icons on the profile page
42ffe4c7 added missing ARIA labels for icons on the profile page
4a6f9333 fixed position for title and aria-label attributes