Fixed groups scrolling

[calixtus]

Fixed #9754

Mandatory checks

• 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.

[github-actions]

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[tobiasdiez]

Thanks! The "always scroll to bottom" bug seems to be fixed, nice. For my taste, the scroll speed however is too slow now. Could it be that the speed is proportional to the number of groups? (Looking at the code it seems to always scroll a certain percentage of the whole view). I think it would be easier to make it an absolute value (i.e. 4 rows every second or so).

[tobiasdiez]

@Siedlerchr did you saw my comment? For me it now takes 2 seconds to move down by one group...

[Siedlerchr]

Follow up

[koppor]

Merged, because JabRef was unusable before. Follow-up takes more time than 10 minutes.

[tobiasdiez]

Sure, no problem. But next time please add a short comment, and reopen the issue.

[AEgit]

I think it would be easier to make it an absolute value (i.e. 4 rows every second or so).

Making it an absolute value in general, would probably make it too slow for large databases (?). Instead I would suggest a lower limit on the scrolling speed, but otherwise keep the current implementation (see also my comments here: #9754 (comment)).