[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
General remark : on your planner menu item like 
<li>
                            <a data-toggle="collapse" data-parent="#planner_page2" href="#planner_page2">
                                <span data-check="planner_page2" class="fa fa-fw"/>Your Expectations
                            </a>
                        </li>

data-parent, href and data-check contains the same information : the id of the planner page. Please use only href (since it is an mandatory attribute for <a>).