[IMP] base, mail: set CRUD on activity view as attributes

Just like other views (form, list, kanban, etc.) CRUD operations (create,
delete and edit) are now set as attributes on the activity node based on
the user access rights.

Task 1894990

addons/mail/static/src/js/views/activity/activity_controller.js

@@ -44,6 +44,7 @@ var ActivityController = BasicController.extend({
             res_model: state.model,
             domain: this.model.originalDomain,
             title: _.str.sprintf(_t("Search: %s"), this.renderer.arch.attrs.string),
+            no_create: !this.activeActions.create,
             disable_multiple_selection: true,
             on_selected: function (record) {
                 var fakeRecord = self.renderer.getKanbanActivityData({}, record[0]);

odoo/addons/base/models/ir_ui_view.py

@@ -1177,7 +1177,7 @@ actual arch.
                         not self._context.get("create", True) and is_base_model):
                     node.set("create", 'false')
 
-        if node.tag in ('kanban', 'tree', 'form', 'gantt'):
+        if node.tag in ('kanban', 'tree', 'form', 'gantt', 'activity'):
             for action, operation in (('create', 'create'), ('delete', 'unlink'), ('edit', 'write')):
                 if (not node.get(action) and
                         not Model.check_access_rights(operation, raise_exception=False) or

odoo/addons/base/rng/activity_view.rng

@@ -8,6 +8,7 @@
     <define name="activity">
         <element name="activity">
             <attribute name="string"/>
+            <optional><attribute name="create"/></optional>
             <interleave>
                 <zeroOrMore><ref name="field"/></zeroOrMore>
                 <optional>