little class tree view bugs

[Jonas Nordin]

> 1. An XXX::operator!=(...) is shown as XXX::operator=(...) in the tree
> view.

I'll fix that.

> 2. Global functions are shown twice.

I haven't fix this. This occurs when you have a forward declaration and
then an implementation of the global function.

> And a question:
> How can I move classes to a virtual sub-folder in the class view?

You can't. The drag&drop stuff isn't impelemented yet.