Units that didn't match the internal base unit
were showing up wrongly.

This also fixes a bug that caused the initial value for
each attribute to be wrong if the default unit didn't match
the unit used internally.

This way, small values don't just become 0, and large values don't
have tons and tons of digits

The fields displayed weren't actually changing when changing views.
This also fixes a bug that was attaching tons of
event listeners for nsfw highlighting to the view list

They'll always be 3/10ths as tall as the world is.

This also gets rid of the groups, which were messing up the layout.

All of the entities are rendered to the canvas. It only renders images, so there are no
names, height bars, etc.

You can paste an image into the window to get a temporary entity.