[IMP]improved some view:project form view,Task form view ,project kaban view, Contract form view and payment,and Chatter of project form view

- Task: https://www.odoo.com/web#id=5179&view_type=form&model=project.task&action=333&active_id=131
- Pad: https://pad.odoo.com/p/r.ZQjz4rt8LM4wWksi
Use self.pool[] instead of self.pool.get. If ir.model.data does not exists, you will have an error 'Nonetype has no attribute get_object_reference', which is less easy to understand than 'Key not found'.

By the way, use xmlid_to_res_id method. This is the new api of the module.