DIALOG_SYMBOL_REMAP: raise after remap is complete

On macOS in particular, there is a tendency for this to fall behind
other windows where the user has no clue it's still up.

eeschema/dialogs/dialog_symbol_remap.cpp

@@ -6,7 +6,7 @@
  * This program source code file is part of KiCad, a free EDA CAD application.
  *
  * Copyright (C) 2017 Wayne Stambaugh <stambaughw@verizon.net>
- * Copyright (C) 2017 KiCad Developers, see AUTHORS.txt for contributors.
+ * Copyright (C) 2017-2018 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 as published by the
@@ -111,6 +111,7 @@ void DIALOG_SYMBOL_REMAP::OnRemapSymbols( wxCommandEvent& aEvent )
     Prj().SetElem( PROJECT::ELEM_SCH_PART_LIBS, NULL );
     Prj().SchLibs();
 
+    Raise();
     m_remapped = true;
 }