JabRef 5.8

What's new in this version:

Added:
- We integrated a new three-way merge UI for merging entries in the Entries Merger Dialog, the Duplicate Resolver Dialog, the Entry Importer Dialog, and the External Changes Resolver Dialog
- We added the ability to merge groups, keywords, comments and files when merging entries
- We added a warning message next to the authors field in the merge dialog to warn users when the authors are the same but formatted differently
- The default file directory of a library is used as default directory for unlinked file lookup
- The properties of an existing systematic literature review (SLR) can be edited
- An systematic literature review (SLR) can now be started from the SLR itself
- On startup, JabRef notifies the user if there were parsing errors during opening
- We added support for the field fjournal (in @article) for abbreviation and unabbreviation functionalities
- In case a backup is found, the filename of the backup is shown and one can navigate to the file
- We added support for the Ukrainian and Arabic languages

Changed:
- We improved the Citavi Importer to also import so called Knowledge-items into the field comment of the corresponding entry #9025
- We modified the change case sub-menus and their corresponding tips (displayed when you stay long over the menu) to properly reflect exemplified cases
- We call backup files .bak and temporary writing files now .sav.
- JabRef keeps 10 older versions of a .bib file in the user data dir (instead of a single .sav (now: .bak) file in the directory of the .bib file)
- We improved the External Changes Resolver dialog to be more usaable
- We simplified the actions to fast-resolve duplicates to 'Keep Left', 'Keep Right', 'Keep Both' and 'Keep Merged'
- The fallback directory of the file folder now is the general file directory. In case there was a directory configured for a library and this directory was not found, JabRef placed the PDF next to the .bib file and not into the general file directory.
- The global default directory for storing PDFs is now the documents folder in the user's home.
- When adding or editing a subgroup it is placed w.r.t. to alphabetical ordering rather than at the end
- Groups context menu now shows appropriate options depending on number of subgroups
- We modified the "Delete file" dialog and added the full file path to the dialog text. The file path in the title was changed to file name only
- Download from URL now automatically fills with URL from clipboard
- We added HTML and Markdown files to Find Unlinked Files and removed BibTeX
- ArXiv fetcher now retrieves additional data from related DOIs (both ArXiv and user-assigned)
- We modified the Directory of Open Access Books (DOAB) fetcher so that it will now also fetch the ISBN when possible
- Genres are now mapped correctly to entry types when importing MODS files
- We changed the button label from "Return to JabRef" to "Return to library" to better indicate the purpose of the action.
- We changed the color of found text from red to high-contrast colors (background: yellow; font color: purple)
- fixed an issue where the wrong icon for a successful import of a bib entry was shown
- We changed the messages after importing unlinked local files to past tense
- In the context of the Cleanup dialog we changed the text of the conversion of BibTeX to biblatex (and vice versa) to make it more clear
- We removed wrapping of string constants when writing to a .bib file.
- In the context of a systematic literature review (SLR), a user can now add arbitrary data into study.yml. JabRef just ignores this data
- In the context of a systematic literature review (SLR), we reworked the "Define study" parameters dialog
- We upgraded to Lucene 9.4 for the fulltext search. The search index will be rebuild
- We disabled the "change case" menu for empty fields
- We disabled the conversion menu for empty fields

Fixed:
- an issue where applied save actions on saving the library file would lead to the dialog "The library has been modified by another program" popping up
- issues with save actions not correctly loaded when opening the library
- the behavior of "Discard changes" when reopening a modified library
- several bugs regarding the manual and the autosave of library files that could lead to exceptions
- an issue where pdfs were re-indexed on each startup
- an issue when using an unsafe character in the citation key, the auto-linking feature fails to link files
- an issue where a message about changed metadata would occur on saving although nothing changed
- an issue where the possibility to generate a subdatabase from an aux file was writing empty files when called from the commandline
- an issue where author names with tilde accents (for example ñ) were marked as "Names are not in the standard BibTeX format"
- an issue where capitalize didn't capitalize words after hyphen characters
- an issue where title case didn't capitalize words after en-dash characters and skip capitalization of conjunctions that comes after en-dash characters
- an issue with the message that is displayed when fetcher returns an empty list of entries for given query
- an issue where editing entry's "date" field in library mode "biblatex" causes an uncaught exception
- an issue where importing from XMP would fail for certain PDFs
- an issue that JabRef displayed the wrong group tree after loading
- that sorting of entries in the maintable by special fields is updated immediately
- the display of issue, number, eid and pages fields in the entry preview
- the page ranges checker to detect article numbers in the pages field (used at Check Integrity)
- The HtmlToLaTeXFormatter keeps single < characters
- a performance r...