* Allow the `color` config to be an object
It only covers the ANSI 16 as named colors, but allows for an array to
be used if the full color palette wants to be overridden.
* Better handling for array color configs vs. object configs
* Dynamically change the `font-smoothing` pref
By default, hterm defaults to `font-smoothing: 'antialiased'`, which
works really well on retina displays. On non-retina displays, however,
the type looks very thin and is hard to read.
This will look at the devicePixelRatio of the device anytime the term
prefs are set, and change between `antialiased` and
`subpixel-antialiased` dynamically.
* Refactor to add the font smoothing override into state
This also subscribes to the electron `move` event to control when this
piece of state gets updated.
* Add UI_WINDOW_MOVE action with a side effect for font smoothing
