HL2 hl2_textures_dir.vpk folder tree is slow to scroll

### Describe the Bug

hl2_textures_dir.vpk folder tree scrolls with low fps

### To Reproduce

1. Open `steamapps\common\Half-Life 2\hl2\hl2_textures_dir.vpk`
2. Try scrolling folder tree
3. It will scroll with low fps

### VPKEdit Version

v5.0.0-beta.4

### Operating System

Windows 11