KiCad: don't rename page description file on new project from template.

Doing so will break the link in the schematic and/or board file so copy
page description file(s) verbatim to the new project folder.

Fixes https://gitlab.com/kicad/code/kicad/-/issues/6524

kicad/project_template.cpp

@@ -2,7 +2,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2012 Brian Sidebotham <brian.sidebotham@gmail.com>
- * Copyright (C) 1992-2019 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 1992-2021 KiCad Developers, see AUTHORS.txt for contributors.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License
@@ -29,6 +29,8 @@
 #include <wx/wfstream.h>
 #include <wx/log.h>
 
+#include <wildcards_and_files_ext.h>
+
 #include "project_template.h"
 
 
@@ -183,8 +185,10 @@ bool PROJECT_TEMPLATE::CreateProject( wxFileName& aNewProjectPath, wxString* aEr
 
         // Do not rename project specific symbol libraries.  This will break the symbol library
         // table which will cause broken symbol library links in the schematic.
-        if( !( destination.GetExt() == "dcm"
-             || ( destination.GetExt() == "lib" && !destination.GetName().EndsWith( "-cache" ) ) ) )
+        if( !( destination.GetExt() == PageLayoutDescrFileExtension )
+          && !( destination.GetExt() == "dcm"
+              || ( destination.GetExt() == "lib"
+                 && !destination.GetName().EndsWith( "-cache" ) ) ) )
             currname.Replace( basename, aNewProjectPath.GetName() );
 
         destination.SetName( currname );