sonata-project/SonataAdminBundle — pull request #1491 by pulzarraider (2013-07-31 20:10:13+00:00)
Title: Add persistent parameters to filter form as hidden inputs

Filter's form is using `GET` method, so persistent parameters should be included to form as hidden input fields.
Before this PR, persistent parameters were included only as query params in `action` url and were removed from url after submiting filter.

| Q | A
| ------------- | ---
| Bug fix? | yes
| BC breaks? | no
| Tests pass? | yes
| License | MIT