Seminar Thesis Template Title Improvements

Our current seminar thesis template does not present any kind of date. Even if there is no specific date for seminar theses, we could at least include the semester in which it was written.

Furthermore, the term "Seminar Software Enginerring" was included in the title so far. To make the "seminar" still visible after the student has entered his title, we could move this information into the subtitle.

The following screenshot depicts the proposed changes of the title of the seminar thesis:

Please merge if the proposed changes can be accepted for the subsequent years.