[MDITAB example] Remove unused variable.
[EXPAND] When not themed, paint simplified glyph.

The bitmap-based glyph with alpha channel looks good in themed app,
but it foes not fit into unthemed windows, and more over the bitmap
painted with GdiAlphaBlend() has some glitches on Windows 2000.

When not themed (on Windows 2000, always) then we just paint plain
black triangle as a glyph.
[GDIX] Add gdix_CreateFontFromLogfontW() and gdix_CreateFontFromHFONT().

Note gdix_CreateFontFromHFONT() is a smart enough to cope with
fonts which witout TrueType outlines, as those are not natively
supported in GDI+.
[CHART] Use gdix_CreateFontFromHFONT() instead of FromDC().

This fixes painting when the control's font does not have
TrueType outlines.