PIM-1437 : Define new parameter for group index action
PIM-1456 : Add link on dashboard to directly manage variant groups
PIM-1437 : Define variant group controller
PIM-1437 : Rollback on group routing removing useless type parameter
PIM-1437 : Define variant group controller
PIM-1437 : Redefine variant group datagrid and remove useless code in group datagrid
PIM-1437 : Make some clean up on group datagrid managers
PIM-1437 : Remove group type column/filter/sorter in variant group datagrid
PIM-1437 : Clean code on group datagrid managers
PIM-1456 : Add links on dashboard
PIM-1457 : Update menus with groups and variant groups
PIM-1457 : Translate variant groups title
PIM-1459 : Change view used by variant group index action
PIM-1459 : Create and clean UI for variant group
PIM-1437 : Clean php documentation and code
PIM-1459 : Add translations for button and title
PIM-1459 : Change behavior for create group/variant group
PIM-1459 : Separate edit view for group and variant group
PIM-1459 : Clean edit view code
PIM-1459 : Translate messages