'shift+ctrl+/' resolves as 'ctrl-?' on Windows

[ghost]

First of all, thank you for the great emmet tool Sergey.

I noticed an issue when using this atom package on Windows. The default 'shift+ctrl+/' keybinding to toggle comments for whole tags does not appear to work (I have ensured that 'use emmet comments' is enabled). I believe that this is because that key combination resolves as 'ctrl-?'. I tested with the keybinding resolver, and it appears to confirm this. I have changed the keybinding to 'ctrl+atl+/' and this has fixed the issue.