Fix issue where find results weren't updated when Cmd+[Shift]+G.

Pressing Cmd+G/Cmd+Shift+G would navigate to next/previous find result.
It would work correctly after the find panel was closed until the text
was edited. At that point, the selection indices weren't updated, so
they would become incorrect, resulting in incorrect text being
selected. This fixes that problem.
Add case sensitive toggle (not yet editable) to Find Panel.
Remove package full summary from /status/ endpoint.

It's available elsewhere and unhelpful here.
I actually can't remember why I added it; perhaps it was more useful in
the past? But now there's godoc (standard and full) and Cmd+R symbols
view.