Support Drag & Drop Functionality Within the Platform Category Treeview

📋 Summary

Add support for drag-and-drop interactions in the Platform Category Treeview to streamline organization and make it easier to restructure platforms, playlists, and categories.

🎯 Feature Overview

Enable drag-and-drop actions for:

• Manually reordering platforms, playlists, and categories (automatically updating sort order)

• Moving playlists into platform categories

• Adding games to playlists via drag-and-drop

Include an optional lock/unlock toggle to prevent accidental changes.

🛠 Use Case

A user wants to reorganize their library by grouping handheld platforms under a new “Portable” category. Instead of editing metadata for each platform, they drag platforms into the new category and reorder them to their preference.

📦 Benefits

• Greatly improves the flexibility and speed of library organization

• Reduces friction when making bulk structural changes

• Aligns LaunchBox with modern treeview UX patterns