Add Enter Key
Merge branch 'Wenjie/HomeView'
Adjust HomeView Layout
Merge branch 'Wenjie/HomeView'
Sorting courses in CourseView
Cancel button sync
All labels/buttons are refreshed every seconds
Merge branch 'Test'
Minor adjustment
Merge remote-tracking branch 'origin/VideoSS' into invigilator
AuthView use single slot.
add terminateButton and modify css.
Merge remote-tracking branch 'origin/invigilator' into VideoSS