Code neatness
Code neatness
Added masks to CalendarTimeTextFields to ensure data integrity.
Added change listeners to CalendarTimeTextFields to alert on failed time parse and disable the submit button.
Set course combobox to display the first class on initialize.
Added masks to CalendarTimeTextFields to ensure data integrity.

Added change listeners to CalendarTimeTextFields to alert on failed
time parse and disable the submit button.
Set course combobox to display the first class on initialize.
Added progress indicator to add new course page.
UNK