Show/hide hotkey in non-English layouts

[achikin]

Ctrl-h shortcut does not work if non-english layout is active.

Steps to reproduce:

1. Navigate to the app with re-frame-10x enabled
2. Switch keyboard layout to a non-English one (in my case Russian)
3. Press ctrl-h

Expected behavior:

re-frame-10x panel is shown/hidden

Actual behavior:

Nothing happens.

[achikin]

This happens because a particular char is checked here, not a keycode https://github.com/Day8/re-frame-10x/blob/master/src/day8/re_frame_10x.cljs#L173

[danielcompton]

A PR would be welcome for this to switch to the keycode. We've had quite a few issues with this toggling hotkey, so we may need to take a different approach in the future, but for now, happy to fix this issue.