[IMP] mrp: hide attachment icon in edit mode
[IMP] mrp: hide attachment icon in edit mode

-also improve tooltip on attachment icon
-and also hide attachment count in edit mode

task-1949618
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo