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-3069: Fix image file prefixes not well generated on product creation (import and fixtures)
Merge pull request #1772 from akeneo/PIM-3069

PIM-3069: Fix image file prefixes not well generated on product creation...
PIM-3339 Update changelog
Merge pull request #1768 from akeneo/PIM-3339

PIM-3339 Ajaxify choice attribute filters
PIM-3367 : normalize job manager
PIM-3367 : clean channel controller
PIM-3367 : normalize group type saving and removing
PIM-3367 : re-work base saver and remove, update channel controller
PIM-3367 : re-work base saver and remove, update channel controller