PIM-1430 : rename grid worker in grid helper, move it in grid bundle, remove
grid renderer dependency from controllers
Merge branch 'master' into refactor/grid_history
PIM-1430 : refactor history grid
PIM-1430 : refactor history grid for product edit view
PIM-1430 : refactor history grid in category view
PIM-1430 : refactor history grid of attribute group
PIM-1430 : refactor attribute history group
PIM-1430 : refactor family history grid
PIM-1430 : refactor association history grid
Merge pull request #447 from akeneo/refactor/grid_history

[WIP] Refactor/grid history