PIM-1299 : add group validation for product group based on group type
(for variant and axis case)
PIM-1299 : add different validtion depending on group type
PIM-1299 : add some javascript to hide or display the axis field
depending on the selected type
PIM-1299 : remove blank validation on group axis
PIM-1299 : cleanup the axis field when you change the type to variant,
then select an attribute then switch back to other type
PIM-1299 : rename create group scenario, fix the skiped and add a cross
sell creation scenario
PIM-1299 : add a method to select axis when we create a new variant
group in scenarios
Merge pull request #396 from akeneo/PIM-1299

[WIP] PIM-1299 : conditional creation group popup