inspector: Fix in Chrome

It seems that Chrome doesn't understand transform, and requires
-webkit-transform?

Huh? I thought Chrome was trying to champion a prefix-less future.
inspector: Fix "No window selected" in Chrome
inspector: Remove a bit of hackyness wrt. showing/hiding

Use a class name instead of setting style.display directly.
article: Add a shape demo
inspector: Show bounding regions
server: Fix picking in the case we have a bounding region, but not an input region