before this commit, the index_content field in attachment form view, is not taking full available space. after this commit, the colspan="2" is added and field will be shown in full width closes odoo/odoo#110037 X-original-commit: c11dcf88abe2d1e15d174d71e80ff48f50faa3c2 Signed-off-by: Julien Castiaux <juc@odoo.com>