Fix sidebar bubble (should not be displayed when unread count is 0)
Fix sidebar bubble (should not be displayed when unread count is 0)

* Modify course layout

BenMQ/coursemology2,xzhflying/coursemology2,BenMQ/coursemology2,harryggg/coursemology2,xzhflying/coursemology2,xzhflying/coursemology2,Coursemology/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,BenMQ/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,cysjonathan/coursemology2,Coursemology/coursemology2,harryggg/coursemology2,Coursemology/coursemology2,harryggg/coursemology2