TwinCat Variable Viewer 1.2.7

• bugfix for PLCs with ports not starting at 851
• fixed crash on startup, label was updated from wrong thread
• added export options for XML and/or CSV
• bugfix in updating status (thread safe accessing of IsLoaded property in MainWindow)
• code cleanup
• display application version in title
• added splash screen
• prevent out of memory error
  when sum symbol reading more than 400.000 symbols. now reading max 500 at once.
  This is slower but reduces stress on the PLC
• bugfix for reading structs (previously not all variables were read)
• colored bool value