Bring a modal window back to front when opening a dialog

Otherwise it can happen the modal window in background blocks the other UI.

src/blackgui/components/dbloaddatadialog.cpp

@@ -57,6 +57,7 @@ namespace BlackGui
         bool CDbLoadDataDialog::newerOrEmptyEntitiesDetected(CEntityFlags::Entity loadEntities)
         {
             this->show();
+            CGuiApplication::modalWindowToFront();
             if (m_consolidating) { return false; }
             if (m_pendingEntities != CEntityFlags::NoEntity) { return false; } // already loading
             if (loadEntities == CEntityFlags::NoEntity) { return false; }