Merge pull request #1619 from akeneo/fix/mapping

Fix Attribute mapping by temporarily using the abstract class
PIM-3222 : fix id filter (MongoDB)
PIM-3222 : fix inconsistency in MongoDB filters
Merge pull request #1623 from akeneo/PIM-3222-fix-ee

PIM-3222 : fix id filter (MongoDB)
PIM-3233 Deduplicate on query side instead of PHP
Merge pull request #1625 from akeneo/PIM-3233

PIM-3233 Deduplicate categories on query side instead of PHP
Merge branch '1.2'
PIM-3037 Make the links widget template independent
PIM-3037 Use a twig extension to render the widgets ordered by position
PIM-3037 Add 'getData' method to WidgetInterface to get the actual widget data
PIM-3037 Create a route to load widget data
PIM-3037 Ajaxify the completeness widget
PIM-3037 Ajaxify last operations widget
PIM-3037 Extend the abstract widget in completeness widget
PIM-3037 Improve widget refresh button styling
PIM-3037 Update changelog
PIM-3037 Use the WidgetController to render widget templates intead of a twig extension
PIM-3037 Remove unused template
PIM-3037 Fix last operation widget label colors
PIM-3037 Fix date display in last operations widget