fix(ui): jank in depthanything model size select

[psychedelicious]

Summary

The select had a default search value, which meant it only showed "small" as an option on first load.

Related Issues / Discussions

n/a

QA Instructions

• Add a CA layer
• Expand advanced
• Set processor to depth anything
• Click the model size dropdown, it should show all 3 sizes

Merge Plan

n/a

Checklist

• [x] The PR has a short but descriptive title, suitable for a changelog
• [ ] Tests added / updated (if applicable)
• [ ] Documentation added / updated (if applicable)