fix(form-theme): do not display empty collection block when the form is compound and its value is null
fix(form-theme): do not display empty collection block when the form is compound and its value is null

OskarStark/EasyAdminBundle,javiereguiluz/EasyAdminBundle,OskarStark/EasyAdminBundle,OskarStark/EasyAdminBundle,javiereguiluz/EasyAdminBundle