Set overview loading state on query input change
Set overview loading state on query input change

- bit of a different behaviour; previously we waited for the debounce time
- the issue there was that all the other states dependent on the query
state don't wait for the debounce, so in those ~500ms some weird things
can occur
- feels super smooth like this, and no more oddities in the debounce time

WorldBrain/WebMemex,WorldBrain/WebMemex