Sanbox, part 1

1. Move DesignerPanel into its own file, rename it to  "Sandbox"
2. Fix formatting issue with Kind popup in Designer.
"loading" a kind should not send updates to the editor

This causes problems with updates from one kind being applied to
another in the same file (!)
Move up/down/delete buttons to Deimos

"Up" and "Down" in particular, don't make much sense when applied in
the designer (where components are just as likely to be side-by-side).
Include root object in model

This gives a proper drop target for new objects.

Also, *actually* stop updating the wrong components block when
switching between kinds.
Don't allow up/down/delete on root component
Remove unused codeText view
Remove unused styles, add "Wrapper" control, change designer "client" to "sandbox"
Remove Wrapper class

Not needed right now - can use previewDomEvent
Update comment
Fix Picker formatting in designer
Merge pull request #195 from enyojs/Sandbox

Sandbox designer changes, part 1: