Malformed boolean value not detected

[libremente]

Subject of the issue

A malformed boolean value is not correctly detected.

Steps to reproduce

Insert a boolean value in a malformed way, such as fals, then upload the file.

Expected behaviour

The editor should catch it and do something (notify the user?).

Actual behaviour

Nothing happens and the wrong value stays there.

[sebbalex]

This should be considered closed as of #103 but I keep it open since the issue is not resolved at all. Now supplying such malformed boolean values Editor will totally crash.

[bfabio]

Now we show an empty error:

The validator returns:
[{"Key":"it/conforme/gdpr","Reason":"Unexpected string key"}]