Improve responsiveness of the app when performaning IO operations (Create/Delete/Remove)

Currently, thunar freezes for the following use case.

1. Open a folder in thunar
2. In that folder itself create 10,000 files using for i in {1..10000}; do touch $i; done
3. Thunar will freeze for more 10 secs. & this is for all views.

What should happen

1. IO operations should not block the main thread of thunar i.e the UI should remain responsive even when the view is updating.
2. If the view is updating with new files or deleting visible files then the UI should show a spinner but never freeze.