Validations for url and email

[kiliankoe]

Currently url and email are checked by validator.js before allowing the form to be submitted by disabling the submit button when a value doesn't pass. If both are wrong, and one gets fixed, the button is activated again.

While we're at it: Validations are no longer working on the edit pages, due to the fact that the id has changed and there are more email fields.

[kiliankoe]

Unfortunately doesn't seem to work with Safari. Chrome handles this fine.

[kiliankoe]

The two alternative options are to validate this like I tried before in the frontend (anyone using noscript can also bypass this) or doing backend validations.

Whilst backend validations do make sense in the long run, this is still a tool for use by the people managing their own database, not the public, so fucking it up and filling it with stupid data would be their fault and problem. I tagged this as longterm for now, the current solution by Lucas via HTML5 validations is cleaner than what I tried before and most browsers support them.

(And this is only for pretty emails and URLs anyway... So.... Yeah.)