Fix Alfred swallowing space and triggering escape

This would probably happen with a lot of applications, but it was always
Alfred for me. It's been bugging me since the start, and the fix ends up
taking me 2 minutes to find the solution to, once I massively simplified
the callback and realised it wasn't the cause for this particular issue.

This is a correction to the initial arguments to `CGEvent.tapCreate`, to
specify that I want the event tap placed at the point where events enter
the login session, not an application, by which time a global hotkey may
have already handled an event or eaten it, nor the window server itself,
which solves the issue but requires the process to run as root.

https://developer.apple.com/documentation/coregraphics/cgeventtaplocation