Refactoring the AnchoredBox component because I wanted to set focus on the trigger button when the expanded box was closed. Wrapping the trigger into it's own component, with forwardRef, allows for passing the `ref` to the actual DOM node. Then the `.focus()` method will work on it.
Rather than a single button with three states, it is three buttons. Went with buttons with `role='radio'` rather than true radios mostly because that is what Radix does.
the `-alt` icons have better sizing/readability than the originals. The originals likely will be removed.
Also adds back in 'fit-width' icon which was mistakenly overwritten earlier.
Adds a new AnchoredBox component that is functionally a clone of the "saving error" notifications, but drops a lot of the JS in favor of the new (chrome-only!) CSS Anchor Positioning API. In subsequent commits, either alternate styling or a polyfill will be added non-supported browsers.
The box contains a few inputs that modify the CSS applied to `.pages`, most critically a "start on right" toggle for the Facing Pages mode.
The range slider should only display a tooltip for the value if the value attribute exists. For example, the difference between controlled and uncontrolled inputs.
Update toolBar.less
Adding class name so that it can be toggled between 'recto' and 'verso'. Verso being the normal left/right configuration, no styling is needed. With recto, the first page is shifted to the second slot, or right side.
Adding the margin resets back in because otherwise each .page margin is set to "auto" on the sides, and that makes them zoom awkwardly when in facing and flow modes.
