use admin's translation domain for delete checkbox

otherwise it's in messages ...
Merge pull request #2063 from uwej711/use_translation_domain_2_2

use admin's translation domain for delete checkbox
Update HelperController.php

fix bug for postgresql : Invalid text representation: 7 ERROR:  invalid input syntax for integer: """
Update HelperController.php
Improve support for postgresql when objectId="" and not null
he confirm exit solution does not work correctly for multiple forms on one page because the serialized data are generated over an collection and not over the single forms.
Update field_types.rst

I thought that it would be good to mention here that all symfony 2 field types are accepted.
http://symfony.com/doc/current/reference/forms/types.html

textarea as example
adjust ErrorElement for symfony 2.5
Merge pull request #2186 from dbu/backport-2.5-fix

adjust ErrorElement for symfony 2.5 - in sonata 2.2 branch
Update installation.rst

Link fixed
Merge pull request #2199 from todstoychev/patch-3

Update installation.rst
Add Entity Audit diff to support revision comparison
Fix formatting issues
Fix wrong history table heading label
Merge remote-tracking branch 'upstream/master' into add_entity_audit_compare
Added diff method to AuditReaderInterface
Undo add AuditReader diff method
Change the compare action to re-use the existing show action for comparison
Change css .diff class scope
Fix unit tests