Fixed typo in log message
Bug 402501 -Rap: [Tree] Space does not toggle checkbox, Bug 402500 -Rap: Enter key does not work if focus is in a tree box

Double click event is not automatically fired when pressing enter as it is in swt, so it is safe to remove the AvoidDoubleClickListener.

https://bugs.eclipse.org/bugs/show_bug.cgi?id=402501
https://bugs.eclipse.org/bugs/show_bug.cgi?id=402500