Background colors indicating compile status

[Csabix]

If the Shader didnt compile make its window/childwindow/tab with a dark red background. If the compilation was successful, the background could be dark green for a few frames. Do the same for ProgramEditor linking.
The files that had errors in them should have red collapsing headers.
When hitting the Program's compile button at most a single thing should be red because it should stop compiling then.