Native windows get lighter when they’re backgrounded so they stand out
less (at least on OS X). Let’s do this too.
Even the Spotify app, which has dozens of developers gets this wrong.
We’re so awesome :)
Also:
- Renamed a bunch of state variables (next time will make separate
commit, sry)
- All window-related variables (e.g. isFullScreen, isFocused, etc.)
live in `state.window` now
- Remove negative class name, use CSS :not() instead
As of this PR (https://github.com/substack/hyperx/pull/22) to hyperx,
attributes are automatically converted to properties for the few cases
where they’re different: class, for, and http-equiv.
