setting the document modified during import is insane

This helps with some huge documents and takes 90% of the time of the
import. The correct next step is to get rid of UNO in the calc style
import.

Change-Id: I6cbd315906405d8f438d99effad122af8edeb01d

sc/source/ui/unoobj/styleuno.cxx

@@ -704,6 +704,7 @@ void SAL_CALL ScStyleFamilyObj::insertByName( const OUString& aName, const uno::
 
                 pStyleObj->InitDoc( pDocShell, aNameStr );  // Objekt kann benutzt werden
 
+                if (!rDoc.IsImportingXML())
                     pDocShell->SetDocumentModified();   // verwendet wird der neue Style noch nicht
                 bDone = true;
             }
@@ -1103,9 +1104,12 @@ void SAL_CALL ScStyleObj::setParentStyle( const OUString& rParentStyle )
                 Fraction aZoom(1,1);
                 rDoc.StyleSheetChanged( pStyle, false, &aVDev, nPPTX, nPPTY, aZoom, aZoom );
 
+                if (!rDoc.IsImportingXML())
+                {
                     pDocShell->PostPaint( 0,0,0, MAXCOL,MAXROW,MAXTAB, PAINT_GRID|PAINT_LEFT );
                     pDocShell->SetDocumentModified();
                 }
+            }
             else
             {
                 //! ModifyStyleSheet am Dokument (alte Werte merken)
@@ -1467,9 +1471,12 @@ void SAL_CALL ScStyleObj::setAllPropertiesToDefault()
             Fraction aZoom(1,1);
             rDoc.StyleSheetChanged( pStyle, false, &aVDev, nPPTX, nPPTY, aZoom, aZoom );
 
+            if (!rDoc.IsImportingXML())
+            {
                 pDocShell->PostPaint( 0,0,0, MAXCOL,MAXROW,MAXTAB, PAINT_GRID|PAINT_LEFT );
                 pDocShell->SetDocumentModified();
             }
+        }
         else
         {
             // #i22448# apply the default BoxInfoItem for page styles again
@@ -1846,9 +1853,12 @@ void ScStyleObj::SetOnePropertyValue( const OUString& rPropertyName, const SfxIt
             Fraction aZoom(1,1);
             rDoc.StyleSheetChanged( pStyle, false, &aVDev, nPPTX, nPPTY, aZoom, aZoom );
 
+            if (!rDoc.IsImportingXML())
+            {
                 pDocShell->PostPaint( 0,0,0, MAXCOL,MAXROW,MAXTAB, PAINT_GRID|PAINT_LEFT );
                 pDocShell->SetDocumentModified();
             }
+        }
         else
         {
             //! ModifyStyleSheet am Dokument (alte Werte merken)