Added two step form behavior to EditEventTaskCtrl
Added two step form behavior to EditEventTaskCtrl

Known issues
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1. Edit functionality for two step forms will end up creating a new
event. Will open it in another PR

singpath/classmentors,shiquan-lim/classmentors,dinoboff/classmentors-1,singpath/classmentors,shiquan-lim/classmentors,dinoboff/classmentors-1