+ handle case if each face has its own color and a face has no triangles

+ do not write out fields of SoFCUnifiedSelection node
+ show wait cursor when importing parts

git-svn-id: https://free-cad.svn.sourceforge.net/svnroot/free-cad/trunk@5406 e8eeb9e2-ec13-0410-a4a9-efa5cf37419d

src/Gui/SoFCUnifiedSelection.cpp

@@ -169,6 +169,20 @@ const char* SoFCUnifiedSelection::getFileFormatName(void) const
     return "Separator";
 }
 
+void SoFCUnifiedSelection::write(SoWriteAction * action)
+{
+    SoOutput * out = action->getOutput();
+    if (out->getStage() == SoOutput::WRITE) {
+        // Do not write out the fields of this class
+        if (this->writeHeader(out, TRUE, FALSE)) return;
+        SoGroup::doAction((SoAction *)action);
+        this->writeFooter(out);
+    }
+    else {
+        inherited::write(action);
+    }
+}
+
 int SoFCUnifiedSelection::getPriority(const SoPickedPoint* p)
 {
     const SoDetail* detail = p->getDetail();