Custom URL should be required when selected

[beerForo]

Affected version

2.2.15

Red should not be able to be saved as an empty field (should be required) since Green is already an option. They have the exact same result. No link.
This can result in saving this by mistake, only to find later your site has had no privacy policy.

 

[beerForo]

Related bug:
In the User Change Log it will state:

Accepted terms and rules
Accepted privacy policy

Even when there is no privacy policy. The link with the check box upon registration only states the terms (privacy link removed). But the log will state both were agreed to. And vice versa. This is when the custom field is left blank so it thinks there is one but there is not. The above fix will address this.