Ctrl+Shift+C difficult to trigger, 2.1.50 mac

On mac, Ctrl + Shift + C uses keyup listener instead of keydown. So you have to have the ‘C’ key lifted first to trigger cloze.

Because I normally go Cmd > Shift > C > Cmd up > Shift up > C up, I thought the cloze shortcut was broken until I looked at the code.

Related issue: Fix 'same cloze' shortcut on macOS · Issue #1748 · ankitects/anki · GitHub

It uses keyup because the repeat cloze shortcut wasn’t working with keydown, so our options are limited here.