removes the task.save()'s and now enables the actual effort field right after the Completed stage dropdown is selected
made TaskInputController also a PopupMenuListener so that we can listen to the dropdown change
Merge branch 'dev-gradle' of https://github.com/slash-slash-no-comment-WPI-cs3733/wpi-suite into input_validation
enables/disables actual effort field when EditTaskView is displayed
fixed getSelectedStage so that it does not fail tests