#1029 editor window vertically pops up

[Corentin Barbu]

Hi,
Usually I like the editor window to occupy half of the vertical space in the jabref window. But in the last beta version the editor window tend to maximize itself to take most of the vertical space.

Steps to reproduce:
- have some new imported articles in the database
Then
- in the article list click on a non-newly imported article
- in the article list click on a newly imported article
-> the editor window maximize itself. If it doesn't work the first time, repeat the last two items.