Wifi password should not be accessible without prior re-authentication

### Problem

Consider a scenario where you leave someone with your laptop unattended just of a few seconds while the elementary OS desktop is not locked

That person could easily open and photograph the Wifi settings dialog of the WiFi connection you set up and take a photo of the password in the input field after toggling it to be displayed in cleartext

### Proposal

Displaying the WiFi password again should only be possible after being prompted for the user's password again and successfully entering the correct password

### Prior Art (Optional)

_No response_