fix(issue#389): Added link to open chat to add new units in courselet
fix(issue#389): Added link to open chat to add new units in courselet

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