[IMP] project: add menu to configure project-related activity types

Activity types are currently hard to find and define. In this commit we
add a menu under project configuration to access generic or project
related activity types (task, issue).

This commit is an improvement considered as an usability fix, therefore
targeting stable version.

addons/project/views/project_views.xml

@@ -631,6 +631,18 @@ action = model.activate_sample_project()
             action="project_task_action_activity"
             sequence="25"/>
 
+        <!-- Activity types config -->
+        <record id="mail_activity_type_action_config_project_types" model="ir.actions.act_window">
+            <field name="name">Activity Types</field>
+            <field name="res_model">mail.activity.type</field>
+            <field name="view_type">form</field>
+            <field name="view_mode">tree,form</field>
+            <field name="domain">['|', ('res_model_id', '=', False), ('res_model_id.model', '=', 'project.task')]</field>
+        </record>
+        <menuitem id="project_menu_config_activity_type"
+            action="mail_activity_type_action_config_project_types"
+            parent="menu_project_config"/>
+
         <record id="action_view_task_overpassed_draft" model="ir.actions.act_window">
             <field name="name">Overpassed Tasks</field>
             <field name="res_model">project.task</field>

addons/project_issue/views/project_issue_views.xml

@@ -372,4 +372,8 @@
             parent="project.menu_project_management"
             action="project_issue_action_activity"
             sequence="25"/>
+
+        <record id="project.mail_activity_type_action_config_project_types" model="ir.actions.act_window">
+            <field name="domain">['|', ('res_model_id', '=', False), ('res_model_id.model', 'in', ['project.task', 'project.issue'])]</field>
+        </record>
 </odoo>