new handling of previews in rkwarddev

[meik michalke]

Am Freitag, 29. Januar 2016, 18:05:01 schrieb Thomas Friedrichsmeier:
> two small related issues:
> 
> 1. [...] I'd suggest to simply assign an id by default,
> as is done for many other elements, including even rows/columns.

done.

> 2. [...] Always specifying the label, explicitly, will work around this
> problem.

also changed in develop now :: m.

-- 
  dipl. psych. meik michalke
  institut f"ur experimentelle psychologie
  abt. f"ur diagnostik und differentielle psychologie
  heinrich-heine-universit"at d-40204 d"usseldorf
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