Fill progress bar on download completion.
Scrolled Frame now fits well.
Mild insignificant refactoring.
Add course-specific authentication.
Save the sections dict in a cache file.
Added filtering UI.
Grid UI for fileter form and file name in downloads.
Fixed download page UI.
Highlight existing files in blue.
Highlight the lecture when hovering over a resource.
Filters now active.
Add todo to handle multiple resources.
Add beta to the window title.
Refactoring and remake setup UI.
Mild UI cleanup.