Search options no longer highlight as cursor moves.

**Describe the bug**
Search options no longer highlight as one scrolls through the options, making it hard to know what/where you're typing.

**To Reproduce**
Steps to reproduce the behavior:
1. Open the find tool with f
2. Try to change some options, notice it works, but no longer highlights.

**Expected behavior**
1. Open the find tool with f
2. See where your cursor is so you can toggle options.

**Screenshots**
If applicable, add screenshots to help explain your problem.

https://github.com/user-attachments/assets/0546c506-46d5-4f8a-866a-665e268bf31e

**Context (please complete the following information):**
- OS/Distro + Version: Arch Linux
- GitUI Version 0.28.1
- Rust version: 1.97.1

Start by running GitUI 0.28.1 on Arch Linux and open the find tool with f, then reproduce the missing highlight while changing search options. Trace the find-tool cursor and option-rendering entry points; done means the current cursor position is visibly highlighted as the options are navigated.

Written by the indexing model from the issue text.