If it is not defined by user, it is set to a legacy 3D files path.
The default value needs to be fixed on MACOSX.
This change could be better, but it is compatible with environment variables and the old way ( defined search paths) to find 3D shape files.
3D shapes files names can  also include an environment variable definition, like libraries names.
However using KYSYS3DMOD in these names is not required.
If the 3D filename is a legacy name, KYSYS3DMOD is automatically used as default path.

Add a workaround to fix a new bug in wxWidgets 3.0 ( Windows specific ) which shows icons only with a size = 16x16 in menus which have attribute wxITEM_CHECK

* Add Henner's patch (with minimal changes) to ensure CVpcb footprint view window is always brought into view, even after being hidden by another window

Fix some incorrect icons (which were using a not supported font for texts). Add ps_router icon from Konstantin Baranovskiy.

Add missing calls to Show( false ) to some main frames (Kicad, eeschema, gerbview), to force config saving when closing these windows.
Code cleanup and minor coding style fixes in footprint_wizard_frame.

The desire is to migrate designs *away from* case independence, and to create
designs which use literally (case specific) interpreted component names. But for
backwards compatibility, you may turn OFF this option if you really must.
(Remember that with KiCad using text data files, typically you would be better
off simply doctoring those files into a case literal state with a text editor
and move forward into the brave new world of case specificity. Also, BOM
generators may not work properly when you have this option turned OFF, the xml
export's referential integrity is broken on library part name. Hence the default
is ON now, as of 29-Jan-2014.