Editor / Associated panel improvements

[fxprunayre]

To facilitate linking to other records on large catalogue, this improve the search and selection.

• Search / Add sort by menu
• Search / Add number of results
• Selection / Highlight record already selected

Checklist

• I have read the contribution guidelines
• Pull request provided for main branch, backports managed with label
• Good housekeeping of code, cleaning up comments, tests, and documentation
• Clean commit history broken into understandable chucks, avoiding big commits with hundreds of files, cautious of reformatting and whitespace changes
• Clean commit messages, longer verbose messages are encouraged
• API Changes are identified in commit messages
• Testing provided for features or enhancements using automatic tests
• User documentation provided for new features or enhancements in manual
• Build documentation provided for development instructions in README.md files
• Library management using pom.xml dependency management. Update build documentation with intended library use and library tutorials or documentation

Funded by https://metadata.vlaanderen.be/

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[joachimnielandt]

Looks good, tested on VL and on core.

To be complete (could be something for later): this is only applicable to associatedResources right? When clicking "link to source datasets", for example, the dialog is still lacking the pagination options.