Further updates for Windows NSI script

.. to add in MingW32 dlls and dependencies
Version String Error

.. in aboutdialog.cpp, accidentally commited earlier
   this month in prep for V3.0 release candidates.
Fix CP chart SEGV on delete ride

.. referencing combo box when in range mode.
Enabled translation of BatchExportDialog
Updated Spanish Translation
Updated Italian Translation (by Marco Piccirilli)
Merge pull request #566 from amtriathlon/master

Enabled translation of BatchExportDialog