Refactor files related to Display
Refactor files related to Keyboard
Refactor files related to Input
Refactor files related to ProfessorInfo
Refactor files related to ProfessorPanel
Refactor files related to Teaching and TeachingList
Refactor files related to Selector
Finish refactoring frame
Fixed bug. TeachingList was not refreshing in view, just added new Teachings
Saving host IP when signed teachings are stored to database
Show message when test related to database loading fails