Add analytics to track “broken” inspector state

- empty tree (one already kind of exists for this state - clicking refresh on an empty tree)
- when a tree loads with one node [root] this is an indication that there are not pub roots set
- ask Jacob for others?
- see how badly things go if you’re paused at a breakpoint
- When firstInspectorTreeLoadCompleted is done check if root is there and tree empty, log error them