Implements the customizations that are required by the parameters. The
icon and one flag are still not implemented.

shell32: RunFileDlg: use symbolic constants for control IDs and use correct hInstance when creating it.

This prevents a few failures in the ddraw tests when using FBOs due to
using P8 surfaces without a palette set.

wined3d: Invert "upsidedown" in fb_copy_to_texture_direct() and fb_copy_to_texture_hwstretch() rather than BltOverride().

This inversion is specific to the blit implementation being used,
stretch_rect_fbo() doesn't need it.