Fix for Tracking Category in settings

[Healyhatman]

The documentation was not very helpful for getting TrackingCategories from the Payroll AU \ Settings. This commit fixes that and enables you to get the EmployeeGroups tracking category setting and the TimesheetCategories setting.

[Healyhatman]

Here's a demonstration response from PayrollAU\Setting showing why this was necessary

<Response xmlns:i="http://www.w3.org/2001/XMLSchema-instance">
  <Id>d271ce45-98a5-4e24-ad12-14bde9a2b5fc</Id>
  <Status>OK</Status>
  <ProviderName>--------</ProviderName>
  <DateTimeUTC>2020-09-24T03:32:27.4542388Z</DateTimeUTC>
  <Settings>
    <Accounts>
      ------
    </Accounts>
    <TrackingCategories>
      <EmployeeGroups>
        <TrackingCategoryID>093af706-c2aa-4d97-a4ce-2d205a017eac</TrackingCategoryID>
        <TrackingCategoryName>Region</TrackingCategoryName>
      </EmployeeGroups>
      <TimesheetCategories>
        <TrackingCategoryID>4e22fd08-1827-4ee6-8f10-c9a7512f69a0</TrackingCategoryID>
        <TrackingCategoryName>Second Category</TrackingCategoryName>
      </TimesheetCategories>
    </TrackingCategories>
    <DaysInPayrollYear>365</DaysInPayrollYear>
  </Settings>
</Response>

[calcinai]

Wonderful!