Disable all browser shortcuts

[hikari-no-yume]

Motivating example: / triggers quick-find in Firefox.

Done by adding e.preventDefault() in every path where a key is recognised, but not in other paths, so that it won't disable bindings that don't conflict.

[hikari-no-yume]

wait don't merge this yet i found another problem with the same thing

[hikari-no-yume]

Changed it to just disable everything because ' also triggers quick-find, which is very annoying while learning to move your fingers around the keyboard correctly, even if it isn't actually used by autokalimba. It's better for me and it's also simpler overall, and consistent with how stuff like ⌘R is already broken.