remove filter that consumes mouse rightclick

[Ravitwr]

Fixes #9281
problem- there was a filter to consume the mouse right click mouse event which disallowed right click to select row but it allowed the context menu row creation for the row
solution- remove the filter as it is made more sense that we will be able to select row with right click also (I checked and windows explorer behaves the same way)

• 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]

Tested it. Works fine. Please add a changelog entry!°

[Ravitwr]

Hi @Siedlerchr , I have added the changelog .