It isn't related to the shader backend any longer. The nvts_enable in
the ffp code isn't quite right as well, it should be moved away once
there is a dedicated nvts fragment pipeline replacement

In version 1.0 of the richedit controls highlighting is done by
inverting the colours.  Version 2.0 and up highlight instead draw
the text using system colours for the background and the text.

msxml3: Fixed ISAXXMLReader_getContentHandler and ISAXXMLReader_getErrorHandler when second argument is NULL.

quartz: Make the file source rotate around the 'first' sample, to prevent starvation of a single stream.

This prevents the file source from starving a single thread off.