Fix unit tests again.
Fix unit tests again.

Wysiwyg._treeWalkEmulator is needed by unit tests.

jdufner/fitnesse,hansjoachim/fitnesse,rbevers/fitnesse,amolenaar/fitnesse,jdufner/fitnesse,jdufner/fitnesse,rbevers/fitnesse,hansjoachim/fitnesse,amolenaar/fitnesse,hansjoachim/fitnesse,amolenaar/fitnesse,rbevers/fitnesse