Fix bug delete subject
Fix bug delete data in listbox
Remove some files
Fixbug
Fixbug show edit score
Start Menu
Merge branch 'dev' of https://github.com/theballkyo/GetA into dev
add studentUI background
80% StudentUI not fix bug
Fix bug image not show when add or update score
studentUI Complete not test bug
can find gpa
StudentUI Complete 100%
improve quality of function in Teacher mode & GUI
Advertise of function
decorate TeacherUI
back btn
back func and optimize code
TeacherUI 80%
fix add student button