Put all the static import at the beginning or at the end of the import list

[surli]

See #1434

[pvojtechovsky]

I guess this was already fixed by TokenWriter feature or #1434. It can be probably closed

[surli]

#1434 did not solve that one. However I don't know if TokenWriter feature change something about that. At least, we should keep it and add a test.

[pvojtechovsky]

During refactorings needed by TokenWriter I touched also printing of imports. And I added there such kind of sorting. So just test is probably missing ...