SwXFrame::setPropertyValue: ignore setting ZOrder on TextBoxes
SwXFrame::setPropertyValue: ignore setting ZOrder on TextBoxes

The ZOrder of a TextBox should be the ZOrder of the shape + 1, don't
allow setting it to something custom.

Change-Id: I17439aa9e494ae62ab80e178a8c5d90cea030351

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core