>Remove the Sale Service option, because 'sale_service' module doesn't exist anymore.
>Remove the option "Time on Tasks" and link the Time Scheduling (resource_calendar_id) to Forecast.
>Hide the Timesheets section if the 'hr_timesheet_sheet' app is not installed.
>Change the label "Timesheets on Issues" instead of "Timesheets Invoicing".
>"Timesheets on Issues" shouldn't appear if hr_timesheet_sheet + project_issue apps are not installed.
