[Libreoffice] HC Cleanup

While creating the HC Icon set, could you look into the following?

default_images/svx/source/svdraw
        cropmarkers.png                 -  2d icons for cropping
        cropmarkers2.png                - 3d icons for cropping
        cropmarkersACC.png              - HC icons for cropping

        markers.png                             - 2d icons for markers
        markers2.png                    - 3d icons for markers
        markersACC.png                  - HC icons for markers

The ACC versions will need to be copied in the 2d & 3d version in the HC set. I've removed the code 
referring to the ACC versions.

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Just to confuse people, I changed the Auto-Detect HC mode option to change the default theme to the 
High Contrast one. Yes, I know that when changing the OS back to a normal theme, I don't change 
LibO back to the old theme (we currently don't have a place to store the option).

I changed the Windows Only code to match this behavior; however, I don't have access to a Windows 
build system so the change is 1) un-tested & 2) theoretically correct. Any testing would be great.

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It should now be save to remove all the HC versions of the icons from all sets and start packaging 
the HC set as it's own theme.

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Joe P.

PS: I believe I've removed all the code dealing with loading HC version of Icons. If no-one 
objects, I'll remove the task from the Easy-Hacks page.