Add scrollable dropdown for WFS format selection menu

[juanluisrp]

• Fix the WFS format menu for very long download format lists.

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

In the Downloads sections of the metadata record view sometimes the list of formats available for download from a WFS service is very long, displaying a large dropdown menu:

After the change the dropdown max length is 300 px and has a scroll bar:

[josegar74]

Tested, works fine