add better QDate expansion for qt5.natvis

[ThomasHeinrichSchmidt]

It would be an improvement for qt5.natvis if QDate was shown not only as Julian day { julian day = 2459412 } but also in a DMY form like this

{ julian day = 2459412 }
    [day]: 16
    [month]: 7
    [year]: 2021
    [Raw View]: {jd=2459412 }

this can be done by using

<Type Name="QDate">
  <DisplayString>{{ julian day = {jd} }}</DisplayString>
  <Expand>
      <Item Name="[day]">((5 * (((4 * (jd + 1401 + (((4 * jd + 274277) / 146097) * 3) / 4 - 38) + 3) % 1461) / 4) + 2) % 153) / 5 + 1</Item>
      <Item Name="[month]">((5 * (((4 * (jd + 1401 + (((4 * jd + 274277) / 146097) * 3) / 4 - 38) + 3) % 1461) / 4) + 2) / 153 + 2) % 12 + 1</Item>
      <Item Name="[year]">((4 * (jd + 1401 + (((4 * jd + 274277) / 146097) * 3) / 4 - 38) + 3) / 1461) - 4716 + (14 - (((5 * (((4 * (jd + 1401 + (((4 * jd + 274277) / 146097) * 3) / 4 - 38) + 3) % 1461) / 4) + 2) / 153 + 2) % 12 + 1)) / 12</Item>
  </Expand>
</Type>

instead of

<Type Name="QDate">
  <DisplayString>{{ julian day = {jd} }}</DisplayString>
  <Expand></Expand>
</Type>

as it is done currently.