DOCX export: handle anchored TextFrames inside shapes

The exporter already handled TextFrames inside TextFrames, a feature
supported by Writer, and not by Word.

Similarly, if DocxSdrExport::writeDMLAndVMLDrawing() starts a shape,
then anchored TextFrames should be posponed till the end of that shape.

Change-Id: I597a8a46b1cf2348a8ccb9af668ea5afab27541b

sw/source/filter/ww8/docxattributeoutput.cxx

@@ -442,7 +442,7 @@ void DocxAttributeOutput::EndParagraph( ww8::WW8TableNodeInfoInner::Pointer_t pT
     // Write the anchored frame if any
     // Word can't handle nested text boxes, so write them on the same level.
     ++m_nTextFrameLevel;
-    if( m_nTextFrameLevel == 1 )
+    if( m_nTextFrameLevel == 1 && !m_rExport.SdrExporter().IsDMLAndVMLDrawingOpen() )
     {
         comphelper::FlagRestorationGuard aStartedParaSdtGuard(m_bStartedParaSdt, false);