It's perhaps debateable if all these modules belong there, but it makes
sense as a first step, to avoid conflicts once we start importing this
from the monolith.
Because the textarea label overflowed its container it was drawn
seemingly closer to the content above it than user-set margins can
account for. This then requires the user to add additional wrappers and
margins to compensate. Drawing the textarea completely within its
enclosing container makes this unnecessary.
This is a necessity to allow doodads to incorporate assets like
background images into their css.
I've tried to make the change as backwards-compatible as possible,
leaving most of the existing funtions alone. The `.css` property on the
returned Styles instance still needs those asset paths though, so this
is still a major update.
This doesn't include the entire spec for the new outline styling, just
the part we currently need for content creation outline draggable
creation. The additions to complete the spec look doable in the current
structure though.
Still missing the assets.
Will have to figure out what to do in general for assets.
The concern is that we try to make assets content addressable
so we can cache them appropriately.
But we haven't done this in a place where we don't also own the assets.
