1.   It's nearly always the case that the Help button has
     no methods called on it except its ctor, i.e.
     no changes to its default behaviour, so explicit
     mention of it can be removed.
2.   Thats's often the case for the Cancel button
3.   That's occasionally the case for the OK button

Change-Id: Ic192962b2e55546cd448d7a69394ae13a743299e