* Additional onChange tests
* Update handling when currentDate or dateTimeFormat changes to avoid errant onChange calls
* Remove unused changeImmediate function
* Refactor input change handling
* Refactoring of updateState* functions to reduce duplication and increase readability
* Refactor to remove a few unnecessary wrapper functions
* Rename setInputStringWithMoment to formatDateTimeForDisplay
* Refactor ISO formatting
* Rename parse functions
* Update controlled stories to properly use state
* Refactored to get rid of useEffect handling of currentDate and inputString changes
Matt Sherman