Fixed "Apply or discard first"

Author: oleg

src/grandorgue/gui/dialogs/organ-settings/GOOrganSettingsPipesTab.cpp

@@ -413,9 +413,11 @@ bool GOOrganSettingsPipesTab::TransferDataToWindow() {
     m_AudioGroup->Append(group);
   m_AudioGroup->ChangeValue(WX_SPACE);
   m_LastAudioGroup = WX_SPACE;
-
+  
   wxTreeItemId idRoot = FillTree(wxTreeItemId(), r_RootNode);
 
+  NotifyModified(false);
+  
   m_Tree->Expand(idRoot);
   m_Tree->SelectItem(idRoot, true);
   return true;