Observable Preferences T (NameDisplayPreferences, MainTablePreferences, ColumnPreferences)

[calixtus]

Follow up to #9493

• Change in CHANGELOG.md described in a way that is understandable for the average user (if applicable)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[Siedlerchr]

Seems to work fine.

[koppor]

It seems, this has to do with column ordering in the main table and in the global search. For the main table, it works great. For the search, column re-ordering leads to a hidden column:

1. Reorder Title / Author (so that Title is last)
   
2. Restart
3. Start Global Search. See "Title" being missing
   

[koppor]

When starting the main branch, the column "Author/Title" is completely lost:

I think, we should nevertheless move forward with this and add fixes after this is merged?

[calixtus]

Is the maintable fine? Since this pr is reducing code duplication with the search dialog and the main table, this is probably a bug in the search dialog and hopefully not caused by my changes 😅 . So I agree, a follow up issue (maybe "good first") with bugs in the global search dialog should be filed and adressed

[Siedlerchr]

As far as I remember the columns in the search are just based on the main table but are stored separate. So they should be independent

[calixtus]

So as both reviewers approved or voted to merge, im merging.