Cryptic filename for downloaded report

[t-schroeder]

If the course shortname contains multilang tags and you download the embedquestion report the filename looks very messy. Example:

course shortname	downloaded file name
<span lang="en" class="multilang">Title EN</span><span lang="de" class="multilang">Title DE</span>	span lang=en class=multilangTitle ENspanspan lang=de class=multilangTitle DEspan_Embedded_question_progress_for_Title_EN.csv