Fix not displayed speaker in chryron

[Elblinator]

Current behaviour:
If a person speaks with an interposed question then the wrong name (the one from the main contribution) is displayed in the chyron

Reproduction:

1. activate interposed questions
2. (connect the structure level with the countdown, requirement due to an unrelated Issue)
3. navigate to a LoS
4. put a person in the LoS and start the contribution
5. but a interposed questions on the LoS, select a speaker (not the same participant as the main speaker) and start the question
6. navigate to a projector
7. activate the chyron
8. the main contribution person is displayed

The LoS:

The projected Chyron:

Wanted behaviour:
The Chyron should display the currently speaking participant even if they speak with an interposed question type

[reiterl]

I think the problem is, that the autoupdate server fills the slide data content with the wrong data.
This needs to be fixed in that service.