Shortcuts unreliable on keypress-stealing websites

[lc-guy]

Trying to use the nazeka shortcuts (mainly m(ining) and k(anji) mode) on websites which have their own keyboard shortcuts (eg. twitter, slack, ...) fails more often than it works. I'm fine with both events firing off, but in most cases, only the native website's shortcut will work, while nazeka's will about ~30% of the time. It's pretty random.

[wareya]

I haven't figured out how to make nazeka take priority yet. Making it work properly is also probably different for different sites.