Add Hierarchical Categories to More Metadata Fields

📋 Summary

Allow hierarchical, collapsible values in additional metadata fields using the same structure currently supported by Genres.

❗ Problem

Genres can be organized using values such as:

Role-Playing / Action RPG

This creates a parent category with a collapsible subcategory. Other fields, including Series and custom fields, currently appear as flat lists even when users need several related values.

Large collections can therefore produce long and difficult-to-navigate filter lists.

💡 Proposal

Extend hierarchical value support to other compatible metadata fields, particularly:

• Series

• Custom fields

• Play Mode

• Other multi-value fields displayed in the sidebar

Users could enter values such as:

• Final Fantasy / Main Series

• Collection / Fan Translations

• Multiplayer / Cooperative

LaunchBox would display these as collapsible parent and child entries throughout applicable filters.

🧩 Use Cases

• Organize a large franchise into main games, spin-offs, and remakes

• Create structured custom categories for hacks, translations, or collections

• Group related values without filling the sidebar with separate entries

• Browse large libraries using more meaningful hierarchies

📦 Benefits

• Improves navigation in large collections

• Makes custom fields significantly more flexible

• Provides consistent organization across metadata fields

• Reduces clutter in sidebar filter lists

⚠️ Considerations

• Hierarchies should only apply to fields where nested values make sense

• Existing values containing slashes must continue to work correctly

• Editing, filtering, and bulk editing should recognize the same hierarchy

• Parent selections should optionally include items assigned to their child values