"Create new node" search field gets slow the more node types are displayed

[Kelin2025]

Godot version

4.0.beta5

System information

Win 10, Ryzen 2600x

Issue description

For now, the more node types exist in the project, the slower the search
Adding a debounce to search can solve this problem

Steps to reproduce

1. Create ~50-100 node types with same-ish names
2. Press "Add child node" on any scene
3. Type something in search input
4. It's very slow and speeds up when more nodes get filtered out

Minimal reproduction project

Not needed

[Calinou]

Duplicate of #27333.