Tab "Other" does not get updated after editing the biblatex source

[koppor]

Steps to reproduce:

1. Open an entry in the entry editor. The entry must have an other field such as bibsource
2. Switch to biblatex source
3. change booktitle to mybooktitle
4. Go to "Other fields"
5. "mybooktitle" does not appear as field

Refs #2002, #2064

Example entry:

@InProceedings{DBLP:conf/zeus/KoppLUW11,
  author      = {Oliver Kopp and Frank Leymann and Tobias Unger and Sebastian Wagner},
  title       = {Towards The Essential Flow Model},
  bibsource   = {dblp computer science bibliography, http://dblp.org},
  booktitle = {3rd Central-European Workshop on Services and their Composition, Services und ihre Komposition, {ZEUS} 2011, Karlsruhe, Germany, February 21-22, 2011. Proceedings},
}

[lenhard]

@koppor Can you please check if #3097 solves this problem for you?

[matthiasgeiger]

Fixed by #3097