Fix: Expand and de-clutter menus for matching search results in homepage #2264

[omar-ahmed42]

Description

• Fix a bug where menus (accordions/feature groups) did not automatically expand on the homepage when search results matched.
• De-clutter search results by hiding empty menus.

UI Change:

• Image:

• GIF:

Closes #2264

Checklist

• I have read the Contribution Guidelines
• I have performed a self-review of my own code
• I have attached images of the change if it is UI based
• I have commented my code, particularly in hard-to-understand areas
• If my code has heavily changed functionality I have updated relevant docs on Stirling-PDFs doc repo
• My changes generate no new warnings
• I have read the section Add New Translation Tags (for new translation tags only)