"Abstimmung läuft"-Preview for the instructor (Beamer)
The results shouldn't be displayed live during the voting itself, because the students can see the right answers there (green marked progress bars). Though, the current usage of this screen should be possible, too. Some kind of setting is needed here. (Maybe the progress bars aren't updated and show up in a grey-style by default and can be enabled by an additional button in this view by the instructor)