from which the current document was created

- In invoices/view.tcl showing the related customer purchase orders
- Allowing to promote a normal invoice to a timesheet invoice, so that
  the report period is shown

- Disabled anything except Finish-to-Start dependency in
  the GanttSchedulingController
- Still need to adapt display in GanttBarPanel

  multiple projects referenced by cost via acs_rel

- Now calculating a budget for expenses based on
  planning items if available

  depending on hard-coded freelancer or customer
  group membership.
  Please use fi_view_xxx instead

  that determines how to calculate "Planned Timesheet"

  Fixed "Planned Timesheet" entry.
  We now use the parameter "ProjectCostPlannedHoursMethod".
  Please see the parameter comment for documentation

  because it was duplicated with respect to
  im_cost_type_timesheet_budget

  Now checks the permissions of the project_finance label in
  order to determine whether it should show or not.

  below the entries in the project financial tab