Include more info in develop: inspect: views

[mrclay]

It would be great to see for each view:

• The full list of files executed in order, with the original extension priorities
• In grey, all the locations (including core) that have been overridden in plugin order
• A list of plugin hook handlers registered on the view

I imagine this would probably have to be brought in via Ajax and require a custom view resolver to capture more data.

[cash]

I started working on a better developer tools tree visualization that will support displaying additional information for views. We still may want to load some of this information through Ajax.