PIM-3278 : Create a simpler user grid view
PIM-3278 : Create a simpler role grid view
PIM-3278 : Create a simpler user group grid view
PIM-3278 : Override user group update view (to prepare grid change)
PIM-3278 : Copy user grid to prepare refactoring
PIM-3278 : Copy role grid to prepare refactoring
PIM-3278 : Copy user group grid to prepare refactoring
PIM-3278 : Copy role users grid and listeners to prepare refactoring
PIM-3278 : Copy group users grid and listeners to prepare refactoring
Merge pull request #1654 from akeneo/refactor/user_grids

Refactor user grids