add hr_timesheet_sheet_no_review, hr_timesheet_sheet_holidays, hr_timesheet_sheet_delete_cascade

hr_timesheet_sheet_delete_cascade/readme/ROADMAP.rst

@@ -0,0 +1,16 @@
+* Public holidays generate timesheet entries carrying ``global_leave_id``
+  instead of ``holiday_id``. Neither policy applies to them: they do not belong
+  to a single employee and there is no balance to restore. They are deleted
+  with the sheet like any other entry, and they are removed on their own when
+  the public holiday itself is deleted, through the ``ondelete='cascade'`` of
+  the field.
+
+* The ``cancel`` policy refuses, resets and deletes the time off request. An
+  installation that wants to keep a history of the cancelled requests would
+  stop at the refusal, which is already where the days are restored to the
+  balance. It is a known variant and it is not implemented.
+
+* The confirmation wizard reads the time off requests in ``sudo`` under the
+  ``cancel`` policy, because a timesheet manager entitled to delete the sheet
+  of another employee is not necessarily entitled to read that employee's time
+  off.