Highlights first filtered item after search
Enter keypress selects first filtered item when focus is on search input

Merge branch '3088-glcollapsiblelistbox-automatically-select-the-first-result-when-searching' into 'main'

Resolve "GlCollapsibleListbox automatically select the first result when searching"

Closes #3088

See merge request !4986



Merged-by: Mark Florian <mflorian@gitlab.com>
Approved-by: James Rushford <jrushford@gitlab.com>
Approved-by: Dan MH <dmizzi-harris@gitlab.com>
Approved-by: Mark Florian <mflorian@gitlab.com>
Reviewed-by: Mark Florian <mflorian@gitlab.com>
Reviewed-by: James Rushford <jrushford@gitlab.com>
Co-authored-by: Ian Gloude <igloude@gmail.com>

# [109.2.0](v109.1.0...v109.2.0) (2025-03-05)

### Features

* **GlCollapsibleListbox:** Visually highlight first result when searching ([0430cc48](0430cc48))