added a unit completion message on the unit Study tab
added a unit completion message on the unit Study tab

derdmitry/socraticqs2,cjlee112/socraticqs2,raccoongang/socraticqs2,cjlee112/socraticqs2,raccoongang/socraticqs2,cjlee112/socraticqs2,raccoongang/socraticqs2,raccoongang/socraticqs2,derdmitry/socraticqs2,derdmitry/socraticqs2,cjlee112/socraticqs2