made texts more accessible, fixes #4022

Closes #4022

Merge request studip/studip!2874


(cherry picked from commit 9268a3d3)

c1895f21 made texts on the profile page more accessible
cf84e396 removed file not deleted during rebase
4e061bad replaced positional text strings
0bc33872 replaced positional text string
09d5596f replaced remaining positional texts