Fix save actions

[koppor]

This fixes #9881.

While playing around, I found out that we had two major issues:

1. The order of the save actions was not retained. They were sorted alphabetically by field. I think, as user, I want to have some logical order of the fields (and not JabRef reordering my things)
2. The remove_unicode_formatter was not parsed. Never. Therefore, I took the liberty and adapted the name to the name of the class - and enabled its parsing.

As a result, no save actions are written if they are the default.

More info: The list of save actions was compared as list for checking if they are the default. Since that list was not ordered by field name (in #9126), it was always different.

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1. Change in `CHANGELOG.md` described in a way that is understandable for the average user (if applicable)

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3. Manually tested changed features in running JabRef (always required)

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5. [Checked developer's documentation](https://devdocs.jabref.org/): Is the information available and up to date? If not, I outlined it in this pull request.

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6. [Checked documentation](https://docs.jabref.org/): 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.

   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.
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