SwXTextDocument::initializeForTiledRendering: allow having different defaults

SetHardBlank() configures the gray background for non-breaking spaces.

Change-Id: I779503189085cc6537b776deb3d30cb93b316acd
(cherry picked from commit e3b0bae4)

sw/source/uibase/uno/unotxdoc.cxx

@@ -3167,6 +3167,11 @@ void SwXTextDocument::initializeForTiledRendering()
         return;
     pView->SetViewLayout(nColumns, bBookMode, true);
 
+    // Tiled rendering defaults.
+    SwViewOption aViewOption(*pViewShell->GetViewOptions());
+    aViewOption.SetHardBlank(false);
+    pViewShell->ApplyViewOptions(aViewOption);
+
     // Disable map mode, so that it's possible to send mouse event coordinates
     // directly in twips.
     SwEditWin& rEditWin = pDocShell->GetView()->GetEditWin();