"An assistant will guide you to configure..." stays displayed even when bridges are deselected

1. Add a setting for Network Connection.
2. Choose “Configure a Tor bridge”.
3. An infobar appears, reading “An assistant will guide you to configure…”.
4. Click on setting for Network Connection.
5. Choose “Connect directly”.
6. The infobar remains while it doesn’t make sense anymore. It should be hidden instead.

Parent Task: #10828 (closed)

Original created by @sajolida on 11952 (Redmine)