Highlighting an "already up to date" document?

[David Nolden]

See KDevelop::DUChain::documentLoadedPrepare(..):
- If the file does not need to be updated, it highlights the document and 
leaves it alone(So, should be highlighted)
- If the file needs to be updated, or does not have all the required duchain 
features, it adds the document to the background-parser, with the ForceUpdate 
flag, to enforce an update in any case.

Greetings, David