Deleted provider connection still displayed in dialog

[refoo0]

When I delete a provider connection from the dialog, it is correctly removed in the backend, but the dialog does not update. As a result, the deleted provider is still displayed in the UI.

Steps to reproduce

1. Open the provider connections dialog.
2. Delete a provider connection.
3. Observe that the dialog still shows the deleted provider, even though it has been removed in the backend.