PIM-3339 Use the operator to filter by empty values in option and options filters
PIM-3339 Allow paginating attribute option choices
PIM-3339 Add available operators to the choice filter type form
PIM-3339 Update specs
PIM-3339 Fix filtering by select2 filters in behat when multiple select2 instances are present
PIM-3339 Fix filtering with empty operator and update behat scenario
PIM-3339 Update changelog
Merge pull request #1768 from akeneo/PIM-3339

PIM-3339 Ajaxify choice attribute filters