The button generated by >>| should always be enabled
When running the following program, the continue button is disabled until the user selects a value in the drop-down box. As the selected value is ignored by the >>| combinator the button should always be enabled.
module Main import iTasks Start world = startEngine main world main = enterChoice ()  [1,2,3] >>| viewInformation "hello"  "world"
The implementation of >>| should be:
(>>|) taskA taskB = step taskA (const Nothing) [ OnAction ActionContinue (const $ Just taskB) , OnValue (ifStable $ const taskB) ]