Alphabetize all the things

Also, delete `static-blocks.xml` which shouldn't have been added in the
first place.

Remove target pane button and actions

Add back putting the sound library in the ui

Refactor sprite info behavior into a container and let it handle the raw events.

TODO: refactor again into redux

Very crude, requires a refactor to allow toggling

For the time being, update the position onChange. Eventually this will update onBlur/on "enter" key

Improves performance by comparing sprite info values (rather than object identities), and by excluding irrelevant data from this comparison.

The inline css method gives us nothing that CSS modules can't give us. This puts the project more in line with the way www works, and makes CSS actually readable.

Using class names gives us full control of the modal styles.

Refactor SpriteSelector into "Target Pane" which contains the sprite selector, stage selector, and the buttons for new sprites, costumes and backdrops.