Different number of scenes in configuration function for mode = Active and mode = Passive

[pagelj]

For some plays, the number of scenes is not identical when using either mode = "Active" or mode = "Passive" in configuration.
It is also not transparent, which column and hence which scene got dropped, because they are automatically numbered.
It seems that usually, for Passive there is one scene less than for Active

Plays with this problem include for example: jn65.0, pzj2.0, r2mn.0, th0n.0, x4vf.0, x8nh.0

[pagelj]

This happens in the segment() function when there are no mentions in a scene

[pagelj]

We probably don't want to change the segment function and introduce a row with empty text just to preserve the scene. The solution might be to check in the configuration function which scenes had no mentions and introduce a count of 0 for all characters in that scene

[pagelj]

#172