Added suport for changing default filter types through event listeners.
can be used for instance to replace ugly dates by bootstrap dateTime picker.
also fixed checkbox mapping.
might crash until https://github.com/lexik/LexikFormFilterBundle/issues/110 gets fixed if you use v2.0.4
I hacked line 246 to look like: if (isset($value['left_number'][0]) && isset($value['left_number'][0]['condition_operator'])) {
and it works. same for line 263.FormFilterBundle/Event/Subscriber/DoctrineSubscriber.php