pcbnew: import files with case sensitive of extensions

[Eldar Khayrullin]

Affected formats:
- brd (Eagle)
- pcb (PCad)
- ses (Spectra)
- dxf
and kicad formats (kicad_pcb, brd).
It is need to add like (*.dxf;*.DXF) for each.

Application: pcbnew
Version: no-vcs-found-d00fc99~60~ubuntu17.04.1, release build
Libraries:
    wxWidgets 3.0.2
    libcurl/7.52.1 OpenSSL/1.0.2g zlib/1.2.11 libidn2/0.16 libpsl/0.17.0 (+libidn2/0.16) librtmp/2.3
Platform: Linux 4.10.0-35-generic x86_64, 64 bit, Little endian, wxGTK
Build Info:
    wxWidgets: 3.0.2 (wchar_t,wx containers,compatible with 2.8) GTK+ 2.24
    Boost: 1.62.0
    Curl: 7.52.1
    Compiler: GCC 6.3.0 with C++ ABI 1010

Build settings:
    USE_WX_GRAPHICS_CONTEXT=OFF
    USE_WX_OVERLAY=OFF
    KICAD_SCRIPTING=ON
    KICAD_SCRIPTING_MODULES=ON
    KICAD_SCRIPTING_WXPYTHON=ON
    KICAD_SCRIPTING_ACTION_MENU=ON
    BUILD_GITHUB_PLUGIN=ON
    KICAD_USE_OCE=ON
    KICAD_SPICE=ON

[Wayne Stambaugh (stambaughw)]

Are you saying that when the file extensions are upper case that they cannot be selected with the file dialog? If so, what happens when the file extension is mixed case? I'm at work and do not have access to a linux box at the moment and want to be sure that adding the upper case variant to the file dialog wild card is as complete solution.

[Wayne Stambaugh (stambaughw)]

I answered my own questions and the solution is going to be ugly. Apparently OSX and windows will show any combination of cases with a wildcard like *.dxf. GTK will not but it does support regex so a wild card *.[dD][xX][fF] will do the trick. Unfortunately, this does not work under msw and presumably osx which means we will have to create wildcards with ugly #if defined( GTK )/#else/#endif wrappers. This applies to all wildcards in KiCad not just the ones mentioned in this bug report.

Here is more information:
https://groups.google.com/forum/#!topic/wx-users/hMuDo51ZN4Q

[Eldar Khayrullin (eldar)]

I think we should use more common cases, like .dxf and .DXF than don't use nothing.
I don't think that programs generate extension like .Dxf or .dXf - that do only man.

[Eldar Khayrullin (eldar)]

It is problem that some Windows programs save files in upper register (like .DXF) even if one selects lower register (like .dxf) in save dialog (maybe for compatibility with some filesystems)

[Eldar Khayrullin (eldar)]

Now Kicad support this extension schem in dialog `Select 3D model` in Footprint Properties.

[KiCad Janitor (kicad-janitor)]

Fixed in revision 652b969193614727fc9e3de61d7c66aa1f89c089
https://git.launchpad.net/kicad/patch/?id=652b969193614727fc9e3de61d7c66aa1f89c089