Restrict selection of multiple radio buttons that belong to the same group to just one

[shahamish150294]

JabRef version on Windows 10/Java 8.

• I am having trouble installing the JabRef.exe from http://builds.jabref.org/master/. I have tested checking out the latest from master.

In Preferences, there are instances at which we need to select an option through radio buttons. Eg: Check screenshot attached. There are many instances in the Preferences where I am able to select multiple radio buttons for each group. Either we need to use checkboxes if multi-select is to be allowed or we should group the radio buttons under a toggle group as done here https://github.com/JabRef/jabref/pull/4408/files#diff-e0f0e1ade7c4cee8c43b0bb2254c21ebR123

I debugged an verified this issue. If multiple options are selected then always the first option (out of all the other selected options) in the if-else condition gets set as the preference.
Steps to reproduce the behavior:

1. Start the app
2. Go to Options > Preferences > Entry Editor
3. Enable autocomplete options
4. Under the "Name format used for auto completion" option, you should be able to select all the options

[Siedlerchr]

Toggle Group seems like the best solution to me. Do you want to fix this?

[paulKra]

Hi, we are two students who found your project through the awesome beginners page and wanted to try on a issue before. If @shahamish150294 does not want to fix it, we would like to try, if he is okay with it.

[shahamish150294]

@paulKra Sure, go ahead! I haven't started this yet. Let me know if you have any questions.

[paulKra]

@shahamish150294 Thanks.
I tried to find all instances of this bug. So far i got
Entry table > Format of author and editor names,
Entry edirtor > Treatment of first names and
Import > Default import style for drag and drop of PDFs
additional to your example. Did i miss some or add one mistakenly?
Edit: On a second look, seems like i forgot some:
File > Do not wrap the following fields when saving
File > Autolink
Entry Table Columns >URL or DOI first
Groups > View Display entries
Edit2: Even More, I simply added every Radiobutton not in a Togglegroup to one now.

[tobiasdiez]

Thanks to @paulKra this is now fixed.