[FIX] mail: open 'My Activities' from systray activity menu

Before this commit, when clicking on the activity view icon
from an item in the systray activity menu, the activity view
had no search filter by default.

This commit now auto-select 'My Activities' in the activity
view when redirected from the systray activity menu.

closes odoo/odoo#30702

addons/mail/static/src/js/systray/systray_activity_menu.js

@@ -118,7 +118,8 @@ var ActivityMenu = Widget.extend({
                 name: targetAction.data('model_name'),
                 views: [[false, 'activity'], [false, 'kanban'], [false, 'list']],
                 view_mode: 'activity',
-                res_model: targetAction.data('res_model')
+                res_model: targetAction.data('res_model'),
+                context: { search_default_activities_my: true },
             });
         }
     },