Does this issue occur when all extensions are disabled?: Yes/No

• VS Code Version:
• OS Version:

Steps to Reproduce:

1. Open VS Code repository
2. While TS server is still initializing, try to navigate files through quick pick
3. The file search will not work until TS server finishes initialization

It feels wrong that any extension can block the file navigation. Maybe we should run the search extension in its one extension host (through extension affinity).