Groups Panel closes when selecting different database

[Braunch]

JabRef version JabRef build from master 21.07.2016 on Ubuntu 14.04 and on Windows 8

Steps to reproduce:

When I...

1. Have two databases opened
2. I open the groups panel in the first one
3. I switch to the second db and open the groups panel too
4. I switch back to the first one (groups panel is still opened)
5. I switch to the second db
   ...then the groups panel closes without being manually closed by me.

[oscargus]

Have you checked the groups preferences? There may be some combinations there which causes the problem.

[Braunch]

I just saw that this is an option you can set in the preferences:

So not really a bug, only a questionable option IMHO.

[simonharrer]

I would simplify this by removing these two options and either the group window is shown, or it isn't, depending on the group toggle status.