Split up listmodelbase

This is to reduce the number of symbols per single object file which caused MinGW 32 bit build to fail.
- Moved CListModelBaseNonTemplate into its own file
- Separated the template instantiations into domain specific source files

src/blackgui/models/listmodelbasenetwork.cpp

@@ -0,0 +1,24 @@
+/* Copyright (C) 2018
+ * swift project Community / Contributors
+ *
+ * This file is part of swift project. It is subject to the license terms in the LICENSE file found in the top-level
+ * directory of this distribution and at http://www.swift-project.org/license.html. No part of swift project,
+ * including this file, may be copied, modified, propagated, or distributed except according to the terms
+ * contained in the LICENSE file.
+ */
+
+#include "listmodelbase.cpp"
+
+namespace BlackGui
+{
+    namespace Models
+    {
+        // see here for the reason of thess forward instantiations
+        // https://isocpp.org/wiki/faq/templates#separate-template-fn-defn-from-decl
+        template class CListModelBase<BlackMisc::Network::CServer, BlackMisc::Network::CServerList, true>;
+        template class CListModelBase<BlackMisc::Network::CUser, BlackMisc::Network::CUserList, true>;
+        template class CListModelBase<BlackMisc::Network::CTextMessage, BlackMisc::Network::CTextMessageList, false>;
+        template class CListModelBase<BlackMisc::Network::CClient, BlackMisc::Network::CClientList, false>;
+
+    } // namespace
+} // namespace