KDevelop4 UI

[David Nolden]

I've implemented the whole thing now. It basically all works behind KXMLGui's 
back, because that one neither like the re-ordering nor the re-structuring. 
But it seems to work very well, and I do like the resulting structure. I think 
it's not very confusing, as the "File" menu is still easy to find.

It still needs some moving around of actions, for example "File -> Quit" needs 
to go into "Session -> Quit".

Greetings, David