Access to mass mailing features is now limited to users with the proper mass mailing permissions instead of being broadly available to employees. This helps protect mailing lists, campaigns, templates, and reports from unauthorized viewing or use.

Task: https://www.odoo.com/web#id=21666&view_type=form&model=project.task&action=333&active_id=131&menu_id=4720
Pad: https://pad.odoo.com/p/openerp-project.task-ID60ZVLN38

Website administrators can now upload and manage the site's favicon directly from the website settings. This makes it easier to keep browser tabs and bookmarks aligned with the company's branding without technical support.

pad :- https://pad.odoo.com/p/r.1nuhX7WPdn9HlF5v
Task :-  https://www.odoo.com/web?#id=20249&view_type=form&model=project.task&menu_id=3942&action=327

The accounting menu has been cleaned up to remove duplicate action entries with the same name. This makes navigation clearer for users working with the Chart of Accounts and reduces the chance of selecting the wrong option.

Task:
https://www.odoo.com/web#id=22366&view_type=form&model=project.task&action=327&menu_id=4720
Pad:
https://pad.odoo.com/p/r.yt8y8hvQZRmTuU1Y

This fix prevents an error from occurring when users cancel a payment in the accounting app. It helps keep payment workflows reliable and reduces disruption for finance teams handling corrections or reversals.

Issue : 670236

Sales service capabilities are being consolidated into the timesheet sales module because both areas now rely on the same project and sales setup. This simplifies the app structure and should make installation and maintenance easier without changing the business workflow.

Description of the issue/feature this PR addresses:

```
* Since the last timesheets refactoring, timesheet entries are always linked to a project, and sale_service has the same dependencies as sale_timesheet.
* This commit simplifies the modules hierarchy by merging two modules that have a close functionality and that were both always installed after timesheets and sales.
```