[crm] implementation planner

- Task: https://www.odoo.com/web/#id=8592&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/r.4BHh6hQdZ4GPR2qE
here we will have  input elements of current page only, when 'mark as done' button get checked ,store the value of each element in dict ,if unchecked then clear the value of elements in dict.