For example, you can now make connections with the connection tool.
Remarkable.
Unfortunately, implicit connections aren't updated as you edit the level
yet.
Also came with some refactors for searching a level and whatnot.
It now supports arbitrary regions! The tool itself still makes
rectangles, but you can shift-drag to add to the selection.
It also distinguishes visually between a floating selection and not, is
more easily visible against certain tile backgrounds and at small zoom
levels, and, I don't know, probably some other stuff.
