[FIX] project: add default project in search more of parent task field

Before this commit, when the user wants to edit the parent task and
clicks on Search more button, the search view has no project by default
however, the default project to display in the search view could be the
one set on the task.

This commit adds a default project in the search view and this project
will be the one set on the task in which the user wants to set a parent
task.

closes odoo/odoo#111125

X-original-commit: 8c3a4e7dff719b8f47ed289aabb4405a401655a4
Related: odoo/enterprise#36348
Signed-off-by: Xavier Bol (xbo) <xbo@odoo.com>

addons/project/views/project_views.xml

@@ -1534,7 +1534,7 @@
                     <field name="recurrence_id" invisible="1" />
                 </tree>
                 <xpath expr="//field[@name='partner_id']" position="after">
-                    <field name="parent_id" optional="hide" attrs="{'invisible': [('allow_subtasks', '=', False)]}" groups="base.group_no_one"/>
+                    <field name="parent_id" optional="hide" context="{'search_view_ref' : 'project.view_task_search_form', 'search_default_display_project_id': project_id}" attrs="{'invisible': [('allow_subtasks', '=', False)]}" groups="base.group_no_one"/>
                 </xpath>
             </field>
         </record>