All XIM interaction will soon pass through this functionality instead
of directly to imm32.

gdi32: Move negative lfWidth test into a separate body, skip the test if there is no 'x' in the font.

winex11: Change the priority of evaluated window styles to workaround a Metacity bug with handling of utility windows.

This can happen e.g. when suddenly color keying is activated and at
some stages we don't know if we will need conversion at PBO creation
time.

wined3d: Use the render target its palette when performing a texture copy as the texture doesn't hold one.