Reduce the size of the components (internal changes)

[grapoza]

Lots of stuff has been added, removed, reworked, renamed, re-renamed, re-reworked, and borked. The components could probably go on a pretty hefty diet. This issue covers items that do not affect the public interface, and can go in a minor version.

• alias this.model[this.childrenPropName] etc to computeds, e.g., this.children
• See if the webpack can minify a bit more
• Refactor CSS to reduce nesting where possible
• shorten private method names
• Refactor event names to a constants file and replace magic strings