Question: Currently (in the latest master branch) it seems that only Event::Shift(char) and Event::CtrlShift(<non-character-key>), but not Event::CtrlShift(char), can be processed. Is it going to be implemented in the future? Are there any workarounds for now?

This feature would be helpful to me because I'm implementing a sudoku game, and it is conventional to map Ctrl + Z to undo and Ctrl + Shift + Z to redo.

Event::CtrlChar('z') => self.undo(),
Event::CtrlChar('Z') => self.redo(), // tried this, doesn't work
Event::CtrlShift(Key::???) => self.redo(), // Key::Char?

BTW can #503 be merged? I was a bit late for the final comment, bit I think it's ready to be merged.